OVERCHARGING OF DATA NO HELP FROM MTN SINCE FEB'15

I do not know what to do anymore, I have now tried all avenues, even going to their H/O in 14th Ave and to date my complaint has not been resolved, this has been going on since February this year. All I can advise anyone wanting to take out a cellphone contract, DO NOT USE MTN!!!! They do not have any customer service skills and do not care about you as a client. I am now going to see what I need to do, there must be a regulator that can resolve this. BTW my phone has been disconnected since September 2015 due to their incompetence to get this resolved. Do not even try and send an email to [Email Removed] you get an automated response acknowledging receipt and they will try and have the query resolved as asap. My first email to them was sent on 25 June 2015, nothing happened since then even after a couple more emails. DO NOT SUPPORT MTN!!!