Telkom - Very unhappy about service - Impossible to either cancel or migrate

Well Okay , where do I start. I went into a Telkom shop to cancel a service in October last year, I'm still getting billed and paying for this service. I phoned in on numerous occasions with no progress - The phone line has now stopped working because it's the old copper line and now they tell me it's in the progress of being upgraded to the smart wireless or something... This can take up to 3 months - My point is.... What must I do? If my service was cancelled then I could have gotten a different provider to come out and install a new product, but no instead I must just sit and wait whilst still paying for a service that does not work until Telkom decides now is the time to help this poor customer. I wonder if someone from Telkom will actually read this message and do something about his ASAP. Just my 2 cents...