BILLING MESS!!!!!

I was previously employed by Multichoice and upon leaving the company i was unemployed for 2 years in which i did not pay my DStv subscription as i could not afford to. Last year February i received a call from Nceba advising that i am owing them R8100 as they did not disconnect services when they were supposed to. He then drew up a payment arrangement for me to pay the amount over 12 months. i have been making payments as arranged . In January i paid direct instead of debit order and have been having my services disconnected almost on a daily basis. Now i am being told i am owing R7345. not only that but they have been billing me for 4 insurances instead of 2. i asked Nceba to please do a recon for me and advise the way forward as this whole mess is as a result of multichoice systems not working as they should. He told me he only deals with internal clients and i must liase with the call centre. Call centre already gave me the run around to commercial, employee etc all saying they are unable to assist me. I have no issues paying the remainder of the 8100 over a few months as i have been doing for the past year if only someone can actually assist me in this matter.