See the guide below about cancelling your contract @Pau including how to get the balance.
Guide: Cancelling Your Contract
You might also want to consider unlocking your phone Guide: Unlocking an O2 phone to use a different SIM card
And if you want to transfer your number Guide: How to get your PAC [June 2021 Update]
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 Do not publish personal details (email, phone number, bank account).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
