Telkom Mobile Won't Cancel Bogus Contract

Cell Direct called me in the 2nd week of June 2014 offering an LTE modem & 10G + 10G a month data contract. The sales person Banica said this contract was a 36 month contract. I stated that I was not interested. Next day I received another call from Banica stating that I could take this on a trial basis with a month by month option to cancel if I was dissatisfied. This was all recorded on Cell Direct's side and they have admitted this is correct. An LTE modem was dropped off at my house. I received no contract to sign. Data was being used up at an incredible rate even when the computer was not being used. I logged numerous faults with Telkom Mobile with no positive outcome. I was running out of CAP and topping up all the time. I have sent 3 cancellation emails,on 20th August 2014, 22nd September 2014, & 6th October 2014 (Reference numbers TTD***, TTD***, TTD***). I also sent Telkom a Telkom Mobile's Customer Service Request for Service and Contract Cancellation Form. A company Nudebt contacted me claiming I'm in breach of contract & could incur an adverse record at the credit bureau. I don't use this service but the accounts keep coming