To pay your bill, call the Payment management team @Fssss .
Their number is 0800 902 0217
The opening times are:
Monday to Friday – 8am to 8pm
Saturday – 8am to 6pm
Sunday – 9am to 6pm
https://www.o2.co.uk/help/account-and-billing/payment-support
You also need to report the sim as lost:
Guide: Lost or Stolen O2 Device? - How to Report it
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 Do not publish personal details (email, phone number, bank account).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
