Loyal Tesco shoppers are not happy after being unable to complete orders after their grocery accounts were locked on the website and app.
Customers complained on Tuesday night that the online orders were not completing for deliveries due last night (Wednesday 26 February).
Shoppers are still finding it hard to log on even though Tesco insists the problem has been sorted.
Others customers are venting their frustrations on Twitter.
One shopper said: "Just wasted an hour filling a basket for an online shop with you for me to get to the payment and you're doing online maintenance!
"You're having a laugh! It would have been the first online shop with you but it's now the last."
Another tweeted: "I've been trying almost 6hrs to buy a shop online. Every time the app or website crashes."
One shopper even had to contend with this problem whilst trying to put in a order for 12 friends on a trip away.
A message appeared to people trying to sign in to their grocery accounts saying the site is down for maintenance and "we're sorry, but something went wrong".
Some shoppers missed the delivery deadline for doing their online shop because the system would not let them pay for the order.
A spokesman for Tesco said: "We have fixed a technology issue which was affecting our website and app last night and we're sorry for any inconvenience this has caused.
"Customers will now be able to log in and place orders."
