I finally got it sorted out !!!!!!  They have cancelled the ' contract ' w.e.f. 17th September ( apparently it takes BT 7 days to remove the ISP provider from the telephone line ). Customer Services became involved and cancelled  the first 2 months when no service existed, a further 2 months cancellation as ' a gesture of goodwill ' but a cancellation fee of over £150.00 for the remainder of the contract. I thanked her for the gesture but still said ' No ' and finally they gave in. All that remains now is to see if BT really do remove them from my line.

Another message, this time from ' Customer Care e-mail team ' ( Customer WOT ?) saying my email has been forwarded to Customer Relations who will ' investigate ' the situation further." They currently have a 10 working day response time so I thank you in advance for your patience "

With the number of complaints they collect I'm surprised it's only 10 days !!!