Unresolved Account

MTN first of all billed me insane amounts of 1900 a month and then failed to debit me and never made any contact with, and then one day they just suspended my services out of no where. i then told them to cancel my contract and I moved to Vodacom. I have contacted them numerous times but they keep telling me my account is with legal, but they never give me legals number and say they will send an email request for them to phone me. until today I have not had one phone call from them. I am just trying to find out what is outstanding on my account so that I can pay it but no one can tell me, so then I therefore take it that there are no outstanding amounts and I will not be held liable as no one cares at MTN and will gladly hand you over without any written warning. I will NOT pay!!!!