Pay for cancelled service or face auto disconnect

Moved my ADSL to another provider only kept the telephone line. This is too much to ask, still billing me for full package. Dispute (***3) logged 15th March, numerous phone calls, no luck. Shortly their automated disconnect machinery will leave me without service. Expect me to pay for a service I cancelled. Yes Telkom, restructure and retrench more people...Lets see if this post has any effect?