Hi
@Paula4109You need to contact customer services on 202 from your handset or 0344 809 0202 from any other phone, when asked about the purpose of your call, then say lost / stolen to get through to an agent.
You are only allowed one free number change, and you may be asked the reason for the request.
This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company