Telkom and bad business

I have cancelled 2 contracts at Telkom - I only have one active contract, after calling, emailing several hundred times for over a year they are still billing me R100 for both cancelled contract, nobody can tell me why? I receive NO benefit for this R100 a month. I spoke at length to Nkanyiso Dlamini who assured me he would sort the problem out but that was a month ago and I am still waiting. I am beyond desperate and want all my money back. I need answers, can someone please sort this out.