Porting number problem and no activation

I took out a contract from Vodacom on 17 Feb 2015 and received the phone on 20 Feb.. Initially they forgot the sim and then sent it later. Having asked to have my prepaid number (MTN) ported, the sim they sent didn't work, even after trying to activate it. Numerous calls, etc., and someone tells me one of the other consultants was wrong and I must go buy a new sim and do a sim swap. After this, no one seems to be able to help, when I actually get through to someone. I even went into a Vodacom store in another town because there isn't one in my hometown and they said they couldn't help me. I have now sent a message asking that my contract be cancelled but received no reply. All I wanted was a basic contract and phone and now it's been almost 2 months without a contract.