Vodacom worst service and given the run around when trying to cancel service

I called Vodacom to cancel my contract after it completed 2 years but was told to try a new service for 14 days, but when i called back each time to cancel i kept being given the run around. Vodacom service is the worst and they make it as difficult as possible to cancel any of the services while they continue billing. I tried to report this to Vodacom but again their systems don't work.