Loyal shoppers have had a pop at Sainsbury's on social media - over a lack of discount offers on their Nectar card accounts.
Concerned customers posted online about a lack of benefits - with some complaining they have had no new deals in weeks.
One even threatened to boycott the supermarket giant and take their custom to one of the chain's rivals.
Bosses, meanwhile, apologised to shoppers and told the Manchester Evening News they are "personalising" Nectar card offers.
One raging customer tweeted: “No Nectar offers this week, so taking my shopping trip elsewhere. No explanation and loyalty schemes work both ways.”
Another said: “For the second week running I've had no Nectar bonus offers for Sainsbury’s.”
A third said: “What the hell has happened to my weekly Sainsbury’s offers? Haven’t had any in two weeks now!”
Others have shared screengrabs from the Nectar app, which shows the message: “You don’t have any new Sainsbury’s offers at the moment, please check back again soon.”
MoneySavingExpert has also shared screengrabs from the Sainsbury’s website, showing how the words “every week” has been removed from the sentence: “We’ll send you a new bundle of offers - you just pick the ones you fancy.”
Another screengrab from the Nectar app shows how the phrase “new offers every week” has been changed to “regular offers”.
Both changes to the Sainsbury’s website and Nectar app occurred between April 16 and April 19.
Shoppers who continue not to receive offers, and want to check if there is a problem with their account, can contact Nectar directly through the live chat on its website, by phone on 0344 811 0811 or via Twitter.
Nectar has around 18 million customers and can be used in multiple stores and online retailers, such as Argos and eBay.
Through the scheme, you build up points which can then be turned into vouchers - one Nectar point is worth 0.5p, which means 100 points would convert into 50p to spend.
Sainsbury's told Manchester Evening News: "We regularly review the promotions available through our Nectar app to ensure customers are always receiving personalised, valuable offers. As part of this process, some offers may be currently unavailable for a small number of customers and we apologise for any inconvenience."
