I am sorry to see you are having problems
I suggest you contact the forum mods they should be able to get this problem sorted for you this is a link to them http://bt.custhelp.com/app/contact_email/c/4951
They normally reply by email or phone directly to you within 3 working days they will take personal ownership of your problem until resolved and will keep you informed of progress
They are a UK based BT specialist team who have a good record at getting problems solved
This is a customer to customer self help forum the only BT presence here are the forum moderators
Doesn't it say on your bill what BT are charging you for? Every phone bill I've had for years has itemised phone, broadband and BT Vision usage, so I know exactly what they are billing me for.