SAINSBURY'S was hit by a major "technical issue" which saw most online deliveries cancelled on Saturday.
The supermarket chain said on Saturday morning that it was "working hard to fix the issue" and apologised to affected customers.
Angry customers said they couldn't pay at the tills, and company bosses admitted that most online shops would go undelivered.
On the morning of March 16, a supermarket spokesperson said: "We are currently experiencing a technical issue affecting some stores, our Groceries Online service, and our ability to contact customers directly.
"Unfortunately, we will not be able to fulfil the vast majority of today's Groceries Online deliveries.
"We are working hard to fix the issue and apologise to our customers for the inconvenience.
Read more in money
However, in a new statement issued late on Saturday afternoon, Sainsbury's confirmed that the payment issues plaguing stores and online grocery orders were resolved.
A spokesperson said: "We can confirm that contactless payments are now back up and running in all our stores, alongside all other forms of payment.
"Our Groceries Online ordering system is working as normal and customers can place an order for delivery anytime from tomorrow.
"We apologise to customers for the inconvenience caused by technical issues today - thank you for bearing with us."
Most read in Money
What happened?
A major technical issue in the supermarket chain's systems caused the grocer to cancel the "majority" of its online deliveries on Saturday, March 16.
The technical issues were also affecting the ability of shoppers to visit stores for click-and-collect orders.
Shoppers also claimed that they hadn't been able to use their debit or credit card to pay for their shop at tills.
Sainsbury's said due to an overnight software update, the supermarket was having issues with contactless payments.
A spokesperson said: "Due to an error with an overnight software update, we are experiencing issues with contactless payments.
"All of our stores are open as usual today, accepting chip and pin and cash payments."
However, at one point, several stores abandoned trying card payments entirely, and customers were forced to leave their shopping because they weren't carrying the cash necessary.
What happens to cancelled online orders?
Sainsbury's said it will contact all affected customers to discuss rearranging their delivery.
A spokesperson said: "We will contact customers proactively to rebook orders as soon as we can."
However, if you don't hear back from the supermarket, we recommend you contact them yourself.
READ MORE SUN STORIES
You can do so by calling 0800 328 1700.
You'll also be entitled to a full refund if your online order was charged but left undelivered.