Difficulties of cancelling

i had a mtn data contract which was coming to an end in August 2022 whereby i was paying R320 for a 20GB. I therefor called in on 04 May 2022 to request an earlier cancellation from them. i kept on calling and my calls end up being cut off. I then send an email to them ,was given a reference number #*** sending emails with no respond up until they responded to me on the following day which was 04 May 2022 requesting a send supporting documents or provide them with my details in order to process the request.

Again on the 11 of June i sent an email to request feedback from them. Since i was not receiving communications from mtn. 13 July 2022 the sent asking for the same information which was given to them on the 05 May 2022. which i did send again but only saw the email on the 02 August 2022 and responded to them.

so know last month i tried to apply for something which i was informed that my account has been handed over to collection without any communication receiving from them .when called MTN on the 24 October to find out what happening with regards to my contract i was told that the account was not closed and from August they were billing me month on month the amount of R1060 . i called to dispute it and given an reference *** and the turn around is 72 hours but today when i called am told that my case is still pending and am owing R5000 something now,so the more they are silence the more they are billing me.