Extreme incompetence over extended period

MTN started charging me in March for data which I never purchased. Despite repeatedly requesting the correction of my account over a 6 month period, by lodging complaints through various channels (e-mail, sms and complaints management), I have had no success, and now my account has been suspended and I am unable to communicate with my clients and family. This despite advising me on numerous occasions that the issue had been resolved. I have had to cancel my debit order and manage my own account with MTN as they are completely incapable. I have requested correction of this error at least 25 times with no success (the data charges were recently reversed , but the interest charged were not - it is a whole R102.40). I have been an MTN customer for many years, and am shocked that they treat their clients with such disrespect. I can't say that I expect more from MTN, as for the past 6 months all I have experienced are new lows. I am also yet to receive a single phone call or email from a human being at MTN - to date, only sms's received. I can only rate this service as lower than low.