Have you lost your phone/sim @Consbund ?
You need to report it lost/stolen so that o2 can send a replacement and you are not charged.
Guide: Lost or Stolen O2 Device? - How to Report it
If not, you need to give us a little more information - why do you no longer have access to the number?
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 Do not publish personal details (email, phone number, bank account).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
