MTN does nothing against *****????

***** ***** ***** never signed any contracts with MTN only to find out that i have 8 contracts with MTN NONE was taken or signed by me. Now they handed me over to DEBT COLLECTOR!!!!! Cant get any of this sorted as they don't come back to me!! When I call the customer care or ***** line no one answer the call or they say they cant put me through to any departments??? REALLY ..... in the mean time I have some debt collectors phoning me to 8 times a day... How do I get this sorted??? I have given a affidavit at the police stating that I have never signed any of these contract, given it to MTN and now.... NOTHING!!!!