FIX MY ACCOUNT!

I have been calling from Friday 26th July to get my account billed correctly and have been ever promised to be called within 48 hours, even Monday I called again using my own airtime because I do not want my services blocked. Your so called Billing department is not doing their jobs, I cannot reach them directly, even your Call Centre sounds like they are lost they don't have any solution for me other that "We will escalate your case". My subscription amount is R614.00 BUT I have been billed for R848.00, everyone fails to explain to me why am I billed this amount. I have paid my normal subscription, but what will happen if the System blocks my account while my case is still going on? You cannot just bill people the way you like without proper consultation and explanation. I NEED SOMEONE TO FIX MY ACCOUNT!! ***