MTN sales department

I made a complaint on the 25th Dec about mtn failing to assist my modem application.I haven't received any feedback from mtn, this clearly shows that mtn is after money not customer service.Thabelo with REQ *** responded saying that they will look into it but up to now mtn hvnt contacted me.The other fustrating thing is that i made a phone call to cancel one of my contract number which ended several months and the person i spoke to did not cancel the contract, this phone call was made on the 29th October 2015 but im still getting charged for this number.can this be fixed without delay.my number contact number is ***