SECOND MORTGAGE NECESSARY TO AFFORD PHONE!

I have been communicating with MTN for a while now re my extremely high phone bill. I don't normally get a reply but when I do it is claimed it is data usage. Last month my bill reached R3900 which to me is not only unacceptable but un-affordable. My service was discontinued until the amount was settled which was done last week. This week they tried to debit my account with R6800!!! I have tried to find out why but to no avail. I am also very much aware of the brouhaha surrounding MTN's billing in the Media - my source being FIN24 - and I am sure there are many more. I do believe that I have fallen victim to whatever is causing these price discrepancies but I am unable to get any feedback from MTN. I have no choice but to refuse payment until I have received an account recon as well as proof of my data usage as I am at my whits end and I really cannot afford these bills. Not once has anyone from MTN had the decency to contact me re the issue - I have only received SMS's threatening legal action. Not conducive to a lasting relationship I would day...