Incorrect Billing causing Debit Order to be declin

I have been trying to using my Data Line and on my enquiry I was told my account has been blocked. I checked my check account and they submitted an invoice of in excess of R8000 against my account. I am on a 2G data bundle and have made two purchases of 2G each on 8 April. This was confirmed by SMS to my MTN online screen.<br> On my enquiry (***) I was told the a call has been lodged to the accounts department which can take up to 8 working days. I am not happy with this and requested to be transferred to a supervisor. I tried this 3 time with no success since I just get disconnected. <br> <br> This means I have supposedly used up 6 Gigs of data which was paid for plus whatever they are currently charging me. In the meantime my business is standing and I cannot do anything whilst the slow wheels of MTN bureaucracy is turning even slower. <br> <br> I want answers immediately not in two weeks time.<br> <br> <br>