Annoyed Client (Doing business with you for 6 yrs)

I don't know where to start but I'm really fed-up right now. I cancelled my contact on the 04 May, and paid R3500 as instructed, then I asked that my number ***) be converted to pre-paid. On the 09 May, I noticed that my number was disconnected (SIM not provisioned:2), on the 11th May I phoned Autopage to query this, a ticket was logged 683052 and I was told the issue would be sorted out, on the 13th I phoned again as I still got the same message, then I was told that I need to buy and new sim card, rica it and do a sim swap, so I got a new sim card, rica'd it and when I phoned MTN to do the sim swap, I was told that my number is disconnected, I must contact Autopage to reconnect it & I don't need a new sim card, I can use the old one... and I did. On the 14th May I phoned again and I was told the matter has been escalated to management and my issue would be resolved by close of business on the 14th... long story short, after making numerous calls since then until last Friday (22 May) my phone is still not working. I have another contract with autopage & I am really contemplating cutting my ties with them. As a matter of fact I'm not paying this month until this is sorted