My partner (PWD) has been locked out of his mobile phone. I think it is because he has not paid the bill. I have contacted 02 and explained the problem - but I cannot pass their security, as I never knew what it was - it was set up years ago. But OH cannot remember what is was due to his dementia. 02 will not speak to me now, and OH doesn't understand what its all about Yet, we need him to have a working mobile so he can contact me if he is out and needs help. what do I do?