Marks & Spencer acknowledges that some products are under-operated in their stores as it continues to deal with the consequences of large-scale cyberattacks.
The retailer said there is "limited availability" in some stores because nearly two weeks of IT system disruption will affect its stores.
The company has decided to “take some of our systems offline temporarily” as part of its “active management of events.”
"We are working to bring the supply of the entire estate back to normal," it said Wednesday.
On Friday, M&S was forced to stop accepting orders on its website (selling about £3.8 million a day) after a few days of disruption caused by cyber attacks linked to hackers collectively dispersing spiders.
M&S also had to pause the delivery of some packaged food to Ocado, an online grocery expert jointly owned by IT.
The damage caused by hackers - and uncertainty about when it ends - in just over a week, M&S's stock market value removed more than £600 million from the stock market value.
The retail website closure was a couple of days of problems in stores that had never touched payments and online order collection on Monday, April 21. Contactless payments restarted later Thursday.
On Saturdays of a busy Easter weekend, a separate technical issue only affected contactless payments.
Shoppers can now use cash or cards to browse in M&S’ physical stores and shop in M&S’ physical stores. However, there were some difficulties in the store, gift cards were not accepted, and merchandise availability was poor in some areas.
M&S did not say which regions or specific products in the country were affected by the shortage.
The goods can only be returned in clothing and household goods stores or by mailing farming. Food stores cannot accept returns.
M&S told shoppers on social media that orders placed after Wednesday, April 23 will be refunded.
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Those who wish to receive online orders in the store by Wednesday this week were told to wait for an “ready to collect” notification email before heading to the store.
Security experts have warned shoppers to take advantage of high-profile incidents.
As warm weather strengthens spending on clothing and food, IT issues interrupted strong trading periods for M&S and many other retailers in the UK.
On Tuesday, analysts at market research firm Kantar revealed that grocery spending on M&S increased by 14.4% in the 12 weeks ending April 20 (before the cyberattack).
The group is expected to report its annual sales on May 21.