MTN out of contract rates and poor customer service

I had a 24 month LTE Data contract with MTN for a monthly subscription of R278.97. In Oct'23 the monthly contract fee suddenly increased to R718, without any warning or notice, and I have not been receiving any monthly statements. When I enquired with MTN, which proved extremely difficult and with long response delay, I was advised that my 24 month contract expired on the 11/09/2023 and that "out of contract" and a month to month subscription rate now app****, which was more than double the contract rate, despite me not being informed of such and the line being dormant. I immediately asked for the line to be cancelled and again there was major delays on MTN's part to cancel the contract, and eventually I was advised that I need to give 30 days notice. I reluctantly agreed as I felt that the so much time had passed since I initially logged my enquiry, but then I was hit with another surprise, which was that the cancellation fees amounted to R1377.50, despite the line being dormant. I reluctantly paid this amount in Nov'23 and as far as I understood the matter as resolved. However, MTN continued to debit my account with a debit order and every time I had to raise a dispute with my bank and tried to engage with MTN to understand why they are still trying to debit my account but I never got a response, and this persisted until March 24. Suddenly in March'24 I received an alert that my credit score had deteriorated and when I enquired, I was advised that MTN claims I owe them 682.50 as the cancellation was only processed on 23/11/2023! This despite the fact that my cancellation request was logged on 23 Oct'23!

MTN's customer service is honestly shocking and I pretty sure their practices are *******!