Marketplace customer service, measured.
What the messages, orders and refunds of Mirakl and Amazon sellers actually say — with the numbers, the maths and the mistakes, so you can act on Monday.
The real cost of a refund: what one returned sideboard actually takes off the bottom line
A refund is not the sale price. It is the shipping both ways, the stock you cannot resell, the commission you may not get back, and the hour a person spent on the thread. The full sum for one ordinary order.
Read the article →Is there software that makes sure I meet the SLA for customer messages on Mirakl marketplaces in the UK?
No software can guarantee an SLA; a person still writes the reply. What software can do is make the deadline impossible to miss: each marketplace's own clock, a list sorted by time left, an alarm before the breach, and a measured reply rate. What that takes, and where one seller actually missed.
Which tool shows why customers message about an order on UK marketplaces, by product and by courier?
One that reads messages and orders from the same marketplace API, classifies each conversation once, and joins it to the SKU and the carrier. What the table looks like, why a join beats ticket tags, what one seller found, and what it cannot tell you.
How do I set up automated responses for customer queries outside business hours on Mirakl marketplaces?
The seller portal has no auto-reply setting; the acknowledgement comes from the tool that reads your inbox. What is allowed on each marketplace, what a safe note says, the thirteen rules that stop it going wrong, and how to switch it on without a surprise.
What's the best way to manage customer messages if I sell on multiple UK marketplaces like B&Q and Argos?
One inbox that reads each marketplace through its API, shows the marketplace's own deadline and keeps the order next to the message. What that looks like, which tools do it, and where each fits, with 90 days of one UK seller's numbers.
How fast do I have to answer customer messages as an Argos marketplace seller?
24 business hours, Monday to Friday 9–5 UK time. What counts as a customer message on Argos, why five of every six inbox items are operator notices, when customers write, and how one seller's replies measured up over 90 days.
How fast do I have to answer customer messages as a B&Q marketplace seller?
24 business hours, Monday to Friday 9–5 UK time. Who writes on B&Q and how often, why 45% of messages arrive after hours, what they are about, and how quickly one seller answered over 90 days.
How do I generate a Mirakl API key for B&Q, Argos or Debenhams?
Initials at the top right → Personal settings → API key → Generate. Why the key belongs to your user and not the shop, why Regenerate breaks things, why a separate user per tool is the safe pattern, and what the key can do.
Is there an eDesk alternative for UK marketplace sellers on B&Q, Debenhams and The Range?
Yes, if your sales are mostly on Mirakl marketplaces and Amazon. What eDesk does that Growstall does not, what Growstall does that eDesk does not, what each costs for a three-person team, and who should stay on eDesk.
What 30 days of marketplace customer messages look like: one UK seller, 10 August to 9 September 2026
255 customer conversations, 655 operator notices, 1,763 orders, 112 refunds. Week by week, marketplace by marketplace, reason by reason, hour by hour. The first of a monthly field note.
What is a Mirakl marketplace, and why do its customer messages behave differently?
One platform runs the marketplaces of B&Q, Argos, Debenhams, Tesco, The Range and hundreds more. The operator sits between you and the customer, and that changes everything about a reply.
How marketplace SLA clocks really work (and why yours is probably wrong)
UK Mirakl operators count business hours, some operators elsewhere count calendar hours, Amazon counts 24 hours flat. A Friday 16:55 message is due at a different moment on each. The maths, with weekends and bank holidays.
5% of orders create a message. Which 5%?
Contact rate by product across 6,200 marketplace orders in 90 days: the handful of SKUs that generate a third of the work, what customers wrote about each, and what that tells you to fix.
Why customers write, by marketplace: the same products, four different inboxes
Reason shares for 490 customer conversations on four UK marketplaces. Returns dominate on one, delivery on another, faults on a third. The operator shapes the inbox as much as the product does.
Delivery complaints per 100 orders, by carrier: 6.7 versus 2.3
Same products, same customers, eight carrier-marketplace pairs. The gap between the best and the worst courier is bigger than the gap between your best and worst product, and it is measurable from your inbox.
Two thirds of refunded orders wrote to you first
64% of refunds on five UK marketplaces had a customer conversation before the money moved. That conversation is the window in which a replacement panel beats a return, and the number tells you whether you are using it.
323 messages in three hours: a post-mortem of an auto-reply that went wrong
A weekend acknowledgement told four years of closed conversations “we’ll be back Monday”. Nothing was broken; two safe changes met. What every marketplace automation now checks before it sends.
Amazon Buyer-Seller Messaging has no API. Here is how to run it from one inbox anyway
Seller Central will copy every buyer message to an e-mail address you choose, and accept replies sent to the buyer's relay address. Read that mailbox, reply through the relay, keep the 24-hour clock, break no rules.
eDesk, Zendesk, Freshdesk or Growstall for Mirakl sellers: an honest comparison
Where each one fits, what none of them do, and the three questions to ask before you pay per seat. Written by Growstall, so read it with that in mind; the criteria are the ones sellers actually raise.