@cbcbc
You can check this site to save calling (It doesn't use your data but you must be on O2 network, not wifi)
https://accounts.o2.co.uk/signin
However, I guess the issue with your app is account related so call customer service to reset your account.
Numbers here Guide: Coronavirus Community Help and Support
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.
