Inefficiency of dealing with MTN to cencel contract

2nd review for the same thing, after a month my contract is still not canceled, after paying the cancellation then being debited at the end of September for the cancelled contract. Now again my contract was credited with data (should be cancelled) and MTN says the 2 systems they use, one show its cancelled and one shows its still active, *** is going on ? why cant this be sorted out? every time i phone i cant just speak to one consultant so i have to explain the story every time and every time i get a different answer, and when you ask for feed back well that never happens. ??????????????????????????????????????????????????????????????????????????????