Worst Service

Worst Service ever!!! I have been a client with MTN for 12 years now. For some reason, there was a problem with the debit order in December 2019. I then made the payment via EFT, I went in on the 2nd January to do my upgrade for the next 2 years and suddenly I have been placed under collection for an amount of R277.00 that was not paid, plus the amount I have EFT hasn't been deducted from my account. So now I have spent the whole of the afternoon of the 2nd to resolve this issue and today the 3rd of January 2020. It is now the 6th January 2020 and yet I can not upgrade and no one can tell me where does the outstanding amount come from. So Guess what I still haven't done my upgrade.