MTN's ******* customer service and *****ing through increased debit order amounts

In March 2019 i signed a 24 month contract with MTN and had no issue until July 2020 where MTN decided they are going to debit my account more than what they should. i then phone and get told i will be credited. the following month i get debited my normal amount i was paying for over a year but my credit does not reflect on my debit amount. i phone them again and i im told that the credit note shows on my statement but they not sure why it did not reflect on my debit amount.

September came and again the debited my account of the increased amount and no credit was given to me.

i phone again and,i even emailed and this is where it became confusing because MTN rep**** to my email saying that the discount i was receiving no longer applies to my account. i never knew i was getting a discount when i signed the contract....and why is it that if i no longer Qualify for the discount was it only canceled 15 months into my contract period and when i phoned in the first time the advised they will credit me, surely they should have seen this then already.

fast forward on to the middle of September i phoned to cancel my contract with MTN and spoke to Sibusiso Masina who asked if i could give him a chance to have a look at the issue and try sort it out before i cancel, i told him that's fine. but i asked why am i having this issue and i was told there was and upgrade that affected the numbers...so again i hear another story...but we are now in October and after a few calls and even Zanele,Berry Maubane and myself sending Sibusiso an email so i can get an update on the issue he has not bothered to reply to the email or get hold of me.