CANCEL MY CONTRACT

On july 1st i emailed MTN customer care to cancel my contract, they ignored me till the 24th i think it was wnen they answered me by saying.....Sorry for taking so long to answer you, but your complaint is being attended to. So hey send me another gig of data and charge me for it, i have sent them numerous emails requesting that they stop my contract, and they always say it will be attended to, i wonder when they will cancel it, as i have just read on HELLOPETER, that 4 other clients have the same problem. Lastly i have told them that i will not pay for any data sent after july, i drove to Mthatha to MTN to cancel my contract, and they told me i did the right thing to email customer care, the last email back to me mentioned i must fax them my cancellation, i said whats the difference?and where do i get a fax machine in the bush where i live, 50km out of PSJ.The num of the mtn card is *** Account number A***