refusing to port my number repeatedly

I called in as per above ref over a week before my bill to port the number to prepaid. I was told this would be done and got a ref number. I found out a few days later this had not been done and then I got charged for another month. I asked again for the port (2nd ref) but it still hasn't been done<br> <br> Meanwhile MTN has ****** over R100 from my account - the thieving little *******.<br> <br> All previous complaints on other matters have got a standard message saying MTN will look into it, but nothing is EVERY resolved