Phoneline disconnected

Hi<br> <br> I recently received an invoice (data) from MTN for an amount was way over my billings cap. I queried the bill and MTN said I wont be dissconencted until the matter is resolved. A month ago my line was unexpectedly cut due to unpaid data cost (same costs that were being queried) and was told I had to pay the costs even though the matter was under investigation.<br> <br> I made an arrangement with MTN to pay outstanding fees over the next few months while the investigation continues. I was told my line wouldn't be closed but saw this morning that it is. This also happened 2 weeks ago and the line was unlocked when MTN discovered their error.<br> <br> This is proving to be a real inconvenience as I use my mobile for business. I tried to call MTN to sort the matter out, but have been on hold waiting for an answer for 34 minutes now. That is terrible service, even with high call volumes, MTN can't expect one to hold on the phone for that long!