Cancelling your MultiChoice/DStv/Showmax account

MultiChoice/DStv/Showmax. Never try to cancel your subscription with this crowd. Despite telephonically cancelling in August 2019, followed up by numerous emails (and phone conversations) over the past 2 years, I am still being hounded by staff or debt collectors who claim I owe MultiChoice a some R208 from 2019. Curiously, after the last bout of communication in September this year, I was assured that the matter had been resolved, that steps had been taken to "clear" my account and that I would not be hassled again. I submitted ALL email correspondence and even received a weak apology for the inconvenience. Well, this Saturday, I received another call telling me I owed money. My irritation with this company and its incompetence has moved through the anger stage to the point where I am now incandescent with rage. I assume MultiChoice may contact me now, but what's the point? No-one seems capable of sorting out this matter.