Sick and tired of MTN!!!

It has been over 3 months that I have been struggling with MTN. I am disgusted by MTN..they keep suspending my line due a payment they could not allocate to my account..I have sent proof of payment more than 5 times.i have never had so much issues with MTN..MTN really sucks!!my account is up to date but they still cannot allocate the payment.i have spoken to one of the managers who promised me that she will make sure this issues is resolved.i upgraded my contract on 03/07/2020 and the consultant who assisted me gave me a package for June. The package she gave me was not on the July Cataloge. I then called less then half an hour after I upgraded as I wanted to changed the package. I spoke to more than 7 different people who gave me different stories as I wanted to cancel the same day..up until today I have not been assisted.i called a department to cancel my upgrade. I spoke to Linda Thuli as she said if I cancel my device it will take 7-14 working days. By then I wont be able to qualify for the package I want.i dont know who to speak to as the managers of MTN are just as bad as the consultants.