Phone contract

[Jude]

I set up a phone contact for my daughter nearly 2 yrs ago. Ive added extra data on by phoning them with no problem. ( they ask if im the account holder) My daughters sim card stopped working so we went to a o2 store to get it replaced. The lady couldnt replace it as she counldnt bring the account up. This was due to the phone account is not in my name. But i was the one who set it up and the D.D. comes out of my bank account every mth. The lady tried every which way to try to help us. She even said the account was not password protected. She got me to phone customer services whilst i was in the shop and the guy on the phone said it was password protected. So he couldnt help as i gave the password for my 1st pet and it was wrong. Hmmm. I think i know my own pets name!!! ( the shop assistant showed me on her monitor it wasnt password protected)
Later that day i phoned customer services again. The lady very helpful. She did manage to set up a new sim card but did state that my daughters phone account is not in mine or my husbands name. It cant be in my daughters name as she is under 18.
My question is how can i get them to change the name to mine when i dont know what name is on the account??

[MI5]

Hope all works out OK for you @Jude 

[gmarkj]

Just a note if you are thinking of switching to make sure the phone is unlocked, and try a pay as you go sim for the network you are considering to check coverage.