EVERY EXPERIENCE WITH THEM WORSE THAN THE LAST!!!

After being given a certain balances more than 6 months, I am now being told that the amounts given to me in the past was incorrect. I am now apparently liable to pay over R2000 (after Multichoice agents, as well as their Whatsapp service, plus the voice prompts for their call Centre) gave me wrong balance. On top of that, I'm being billed for every month. Even after my decoder has been disconnected. And will be held liable for the full 24 months subscriptions although I'm not even watching TV at the moment. My last query was supposedly attended to... But whilst still waiting for a telephonic response, my service was once again disconnected. After informing them of the times they can call me. They call me once on a Sunday morning (whilst I'm in church) And 2 days later... No contact from them whatsoever and voila. My services once again disconnected. Does anyone have any info as to what my next step may be in resolving this issue with such an unprofessional and *********** company?