No response!

I had an account with MTN and had 1GB a month. My data would accumulate every month. One month I received a bill for out of data charges, but when I checked the MTN app on the iPad, it said I still have 1.3GB of data. I then tried to dispute this to no avail. My questions were never answered. My account was then sent to legal for a few months now. My ID is ***. I have sent the legal team 6 emails, to 2 different email addresses. I have called more than 4 time and I have messaged their twitter account 6 times. I was promised that someone will call me. I have not been contacted by legal since its gone to them as I've sent legal email to [Email Removed] 3 times on from the 6th Jan 2016. [Email Removed] twice from the 18th Jan 2016. I've called 6 times everytime requesting legal to call me on my number ***. But nothing! I want to fix this but if no one replies to me how can I