Telkom sucks please assist

I don't know where to start we used to have a house that we bought from Telkom in Bellivlle it was a cordless house phone once the contract was finish my father cancelled the contract however we tried to cancel the contract on there website but it always gave us problems then we went into Telkom in Tygervalley and they gave us a cancellation form which we filled in but they advise us to pay R1428.39 but the phone is not in use we are not getting assists from the people at telkom how can we pay for a phone that is not in use we keep on getting billed for the phone we are not using we got a billed for R696.29. How can we pay if the phone is no longer in use my parents are no longer working I'm not going to pay for something that Telkom did not cancel. Telkom is not assisting us in any way and when we do call in they put you on hold for long.