Incorrect Billing - No Communication

In the last month of our iPad contract we suddenly had an account of R1500 for data used out of bundle. This was impossible since the account was suspended in April when I went over the credit limit which I set. I never bothered to activate it again as I was using an Afrihost data card at cheaper rates. The account was paid at the end of that month via debit order. MTN customer care advised me they have issues with billing and I should pay my cellphone bill cash and wait till the iPad account is sorted. Ref ***. End of July my cellphone was suspended. I lodged a formal complaint. Req:*** Never received any update and now have to call 808 each month to use my phone. I work late hours and don't have time to hold 45 min for 808. I am also at risk by having no means of communication when driving home. I am appalled at the amount of complaints due to wrong billing. I will not pay for data I did not use.