MTN yet again still problems with incorrect payments (3rd month complaint)

Hi, This is now out of control. This is the 3rd month where I have to complain about MTN with their billing. I am sick of this. I tried calling the MTN complaints department number that was given to me but the number no longer exists. I did get an email and phone call beginning of the month however the phone call the lady said all is in order and 1st September I will be paying the correct amount forward which I was happy about. The email from Bongeka an MTN gave me an amount that is different that was said on the phone and now today 2020 09 22 I get an sms where the message said I I need to pay an amount that is more than double what I actually have to pay. I want answers as to why accounts is messing around with my MTN contact billing amounts as if this amount does go off as i explained to Bongeka when I rep**** to the email a few minutes ago I will be doing a reversal as i am sick of this with my accounts being messed up like this. Can Bongeka or someone either replay to the customer service email (Reference number: ***) or call me and explain the issue and error that was made on my account. I want this before end of business day today

Kind regards Mr Klopper