My username seems to be my husbands email address,I may have put this as the recovery email address.
I have followed steps to change it to my email address but it says that is already registered so what do I do?
You need to contact customer services and they will sort out your account Guide: How to find help & contact O2
Best of luck and welcome to the forum
Veritas Numquam Perit
Just to add the best time to call customer services is between 08.00 and 08.30 am
they have more time then.
Welcome and best wishes