Dissatisfied with service from MTN.

I'm so disappointed with mtn, in April I paid my account via eft due to the stores been closed,I used both my cellphone numbers has a ref,anyway my lines were suspended I called them, explained the storie, even sent the payment, they told me payment will be allocated, 2weeks later line was suspend again, I called them I had to explain they reactivated my lines, then again it happen, I can't imagine how many times I had to call the call center in this past 3months, I'm really annoyed,it this frustrating, I have also complained on messanger via Facebook, so this morning I receive this message, Y'ello. Please pay R 1893.25 to avoid a negative impact to your payment profile/credit rating with the credit bureau. You can pay with MyMTN app or via ABSA, FNB or Standard Bank. Select MTN and use A*** or *** as your payment reference, Negative impact when my account is paid it just that the payment is not allocated. I NEED THIS RESOLVED ASAP.