Dstv will not let me cancel my subscription

So I wanted to cancel my streaming package. Went to their app, clicked all the right things and could not cancel it for that month, had to select 30 days later, which I did. Come 1 month layer and lo and behold, they still debit me. Call in and tell them, the promise to call me the same day, they dont. Call.in again the next day, get transferred to their customer centre, stay on hold for 28mins before just hanging up and coming on to HelloPeter. Why is it so difficult to cancel with them? I mean I know they want to make money but this is shocking.