Vodacom doesn't care, they just want your money

A few months ago I upgraded my contract. Before it kicked in I phoned and cancelled a data bundle and a voice bundle. I was sent SMSs that confirmed the cancellations. After the new contract kicked in, I was still being charged for the voice bundle. Again I called and they confirmed it was cancelled and they would sort it out. They didn't. Last month I called again and they said they would escalate it. They didn't. Another month and still not cancelled. Now I will have to go the legal route. Useless company.