Vodacom takes peoples money!!!!

Vodacom sucks! I have been a loyal paying customer for 10 years plus. Last year I discovered they were charging me for Entertainment Services that I never signed up for, for more than 6 months. I called in and waited for 20 mins before someone supposedly cancelled these services. Then I heard nothing back, no refund, no comms, nothing!!! When I call in they tell me I will be contacted. I just checked my latest bill and again I have been charged!!!!! This is unacceptable that they bill you incorrectly and don't give a **** about rectifying the mistake! I want to cancel all my contacts with Vodacom and not even that works!!! What the hell can I do now?!??