***** contract debiting money,no cellphone.

I received a call from so called sales provider, from MTN and she offered me a 24 months contract in November/December 2016. A cellphone and airtime for R199.00 per month.I agreed. Before i receive the cellphone,four to five different companies under the umbrella of MTN debited money from my account.It was more than 700/800 rands.They did not deliver the phone.I went to the bank and reversed the money.Again it happened on several months.I called MTN and cancelled the contract.I'm told the contract was cancelled. After few months i received threatening SMS's and calls from debt collectors representing MTN.They demanded their money.I have explained the situation to them but it felt on deaf ears.I even took the matter to my lawyers and also logged query with Transunion hence i discovered that MTN has listed me on ITC.This has a negative adverse on me because i am unable to get any credit from the service providers.Everytime they reffer me to MTN. I need your intervention because i am even thinking of exposing MTN to the media or newspapers to warn other customers not to fall on the same trap like myself.