on 11-07-2023 16:47
on 11-07-2023 18:58
The app can be temperamental - if you can get in via the browser: https://accounts.o2.co.uk/signin
then uninstall and reinstall the app.
Otherwise, it could be that your account is being moved to 360 back-end, more here:
https://community.o2.co.uk/t5/Welcome-News/O2-System-Updates-360/m-p/1598402/highlight/true#M39424
Otherwise give it 24hrs for the nightly reconciliation to occur, if still no joy tomorrow, reach out to O2 via Social Media, the ways are shown in the link just below this post. Good luck!