My o2 account

[Notworking]

I have been unable.to log in to my o2 account for a while

[pgn]

If the app is failing, but this, in a browser, works: https://accounts.o2.co.uk/signin then you may need to uninstall the app, reboot the phone and reinstall the latest app version from your handset's app store, @Notworking 

Otherwise it is a problem O2 need to address, you can get at them via Social Media using the link just below. Good luck!