Have you tried the website and does that work @Aaron10 ?
If yes, try uninstalling the app, reboot your phone and install again.
If no, it might need some help from customer services.
Give O2 a call on 202 or 0344 809 0202 (Contract) OR 4445 or 0344 809 222 (PAYG). Best time to call is 8am.
Or you can message O2 on Facebook ( https://o2uk.co/O2CFB) , Twitter ( https://o2uk.co/O2CTW) or Instagram ( https://o2uk.co/O2CIG), hopefully they should be able to help.
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
