MTN Refuses to Help - Takes my money

Hi

I need to cancel my contract and move it to prepaid so that I can port it.

First time I tried was on 15 Sep at 14:03 (ref # 300 655 391). I was told all is done. I then went to the shop to port the number, but I got the error message "account type mismatch".

Second time was on 17 September 13:32 (ref # 300 673 687). Again, I was told all is ready. I went to the shop again, and again I got the error message "account type mismatch".

I have since phoned four more times only to hear that your system is offline. I have been assured that I will not be billed anymore, but this morning I got a bill again.

HOW DO I GET TO SPEAK WITH SOMEONE THAT CAN HELP ME? I need to port my number to another network. WHY DO YOU REFUSE TO HELP ME?

Please assist!!!