Morrisons has reduced the price of items including turkeys and champagne for all shoppers after a system glitch hit its loyalty card on Monday.
A spokesman for the retailer said: “Today we are experiencing some system issues which are affecting our More Card customers.
“For More Card customers who have Morrisons Fivers to redeem, these will be done manually in store by colleagues.
“All our stores have now made the top 100 More Card prices the regular price – including the 10p veg deal, turkeys, spirits and champagne.
“And in addition we will give More Card customers an extra 10 per cent off their entire shop as an apology.”
Customers also complained they have been informed of delays to their home deliveries or click and collect orders on Monday.
Customers said they were waiting for confirmation that their orders due on Monday had arrived in store for collection.
Morrisons said: “For click and collect orders, we are asking customers to wait for an email to inform them that their order is ready for collection before heading to store.
“Some home delivery orders may be arriving late today – and we will be communicating directly with those customers affected.
“We sincerely apologise to our customers for this inconvenience.”
Sue Davies, head of food policy at consumer group Which?, said: “Just days before Christmas, Morrisons’ customers will be understandably frustrated to find that they are unable to use their loyalty card discounts and that some online orders have been cancelled.”
She said the supermarket must “work quickly to resolve these issues” and ensure customers receive their orders.
