letter received saying 'owe money and will block device'.

[Julia70]

I have received a letter saying I owe money on  my account and because I haven't paid they will block my device. I pay a monthly DD and don't owe any money.

[jonsie · Accepted solution]

You need to call customer service
Advice from an O2 Guru to get through:
If you call 202, when it comes to the reason you are calling stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Choose the fraud option if necessary