Complain

I have been having endless problems with mtn since May 2020. They tried to double bedit n triple debit my acc and everytime they done that it got reversed and I paid the installment into there absa account and ever since I have been doing it every month up until today and yet they keep on saying I'm in areas. I have sent bankstatements and proof of payments and then they just come back with the same story. Ever since I have my contract with mtn this is the first time this happens to me and it seems no one can help cause my account was put on there new system. All I want now is nothing to do with mtn and cancel my contract. The contract number is *** and the number I can be contacted on is ***. I really don't have the energy anymore to deal with mtn cause I have been on many calls since may 2020 and even with there complaints department that also could not assist