Vodacom refuses to cancel my contract

I have had very bad experience with vodacom I have been trying to cancel my contract since November 2019, and I keep on being sent from pilar to post. I get billed on a monthly basis for a service I'm not using. In april they force me to pay the outstanding amount which I did so that the account can be closed and nothing was done. I'm sitting at vodaworld right now 27 june and they are telling me the same nonsense that I can to start the process from scratch. This is the biggest bull**** I have ever had to deal with. Why should I continue throwing my money down the drain for a company that doesnt care about my needs as a customer