DISGUSTING SERVICE!! STAY AWAY!!!

I am utterly disgusted by the service that I have received from Cell C! Earlier this year, I called into the contact center to request the settlement amount for 3 contracts that I wanted to cancel(2 cellphones and 1 laptop) I was given an amount to paid of which I was told was the final amount, no additional charges, and did so. I was then pushed from pillar to post trying to cancel these contracts after I had already paid the settlement amount. Eventually after about 2 months I was assisted by a Musa is the Social Media department with canceling my contracts and was guaranteed that there would be no additional charges. 2 months when on and I realized that Cell C had not been debiting my account for the contract that I had remaining. I called into the contact center once again to find out why and was told that my account is in a credit and that is why I had not been debited. On Daturday I was contacted by a consultant in the Collections department and was told that my account was in arrears why R5709???? What's worse, they put me in arrears on ITC for an account that is in "credit". I need answers ASAP!!!!!