You probably need to speak to customer services then @michalgonczaruk
One way to do this (cancel your number and get a final bill) is to get a STAC and use that with another phone you have - this will tell o2 to cancel your number and get a bill.
How to get your PAC in the guide below (the process is the same for a STAC).
Guide: How to get your PAC [June 2021 Update]
See advice on cancelling your contract in the guide below.
Guide: Cancelling Your Contract
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 Do not publish personal details (email, phone number, bank account).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
