ADT poor service - *** - Termination

I signed a contract with ADT. I had back forth bad service over and over even when I made contact with Management I still got the unacceptable outcome. I terminated the contract, Shaine Abrahams assisted me by sending through the email of termination stating I owe R1269.18 will be applicable + R356.84 the outstanding balance = R1 626.02 vat inclusive. I paid R890 into ADTs acc on 5 Dec 2014. They handed me over to debt collectors for the Full 1626.02. I paid the debt collectors only what i owed: R736 i paid this outstanding amount to the debt collectors.Why wont the ****** ADT own up to the payment and clear my name. I have all the proof in black and white. Preferably a manager mist call me to have this mattered escalated and just assist me. What if an employee stole the funds and hence why its not allocated to my account on the system . This entire process with ADT was a real nightmare. I'm willing to take this to the papers if This matter Isn't resolved.