Poor service

********** account resolution. Firstly, I was over charged bcoz they did not cancel my contract when I contacted them December 2021. I was handed over to CSS in April/May 2022. I was informed I had a bill in excess of R2000, knowing this was inaccurate, MTN then reduced my fee tp R960. Of which I paid...I contacted MTN to only find that my cancellation letter is not being provided even when I have setlled my actual fees. I advised the debt collectors that I had cancelled I settled my account in June with the service provider in June 2022 and when I received the cancellation letter.