Tesco Bank customers struggled to log in to their accounts and make payments this morning - just as Black Friday sales kick off.
The issues affected both the Tesco Bank website and app, with people being met with messages that read: "This service is currently unavailable."
Tesco Bank confirmed both services were back up and running by 12.30pm.
It comes after outrage tracker Down Detector showed a spike of just over 400 people complaining about Tesco Bank shortly before 9.30am.
Are you having trouble accessing your Tesco Bank account? Let us know: mirror.money.saving@mirror.co.uk
The website showed 38% of people had trouble with mobile banking, 37% had issues with credit card payments and 24% struggled with online banking.
Frustrated customers also took to Twitter to complain about the issues.
One person said: "I have just had payment problems @tescobankhelp @TescoBankNews and your website is down!"
Another said: "Unable to make a payment or see my account on my app. Is there an eta on a fix?"
A third tweeted: "Hi, is there a problem with your app/payment system? Cant [make] payments on my credit card and cant access the app."
And a fourth complained: "On hold for 30 minutes then the call cut off! Is yours app/website down? I can’t log in?? Please can you help."
Another said: "I have just had a payment declined."
The banking arm of the supermarket first confirmed it was experiencing issues on Twitter.
A reply from the Tesco Bank Help page to one customer reads: "We're seeing some customers having issues with accessing the mobile app and online banking at the moment.
"Our team are investigating this currently and aim to resolve things as quickly as we can. Apologies for any inconvenience caused."
A spokesperson told The Mirror: “We were having trouble with some of our services this morning. We’re pleased that everything is back up and running again.
“Thanks for your patience and we’re sorry if this caused any inconvenience. We’re keeping a close eye on things to make sure things keep running smoothly.“
Are you entitled to money back for bank glitches?
If your bank services have gone down, you aren't automatically entitled to any compensation - it instead depends on how badly the outage has affected you.
For example, if it made you miss a bill or some sort of payment.
It also depends on how long the service disruption lasts for and how quickly the bank worked to resolve it.
Tesco Bank has a dedicated page online to help you make a complaint.
If you're considering making a complaint, you should gather evidence about how the service issues affected you and for how long.
If you're in desperate need of access to your money but your online services are down, you can go to your local bank branch to withdraw your funds as normal.
If you don’t have a local bank branch nearby or you're unable to get there, try and call your bank or contact it on social media to ask what to do.