Pay back my money Multichoice

Multichoice debited my money even though the service was cancelled. I cancelled DStv in February & to my surprise, on 3 March, I got a debit notification, R588 gone...I called them immediately to find out why & they promised to refund in 14 days. Today is after 21 days & every time I call them they're telling me more days which they seem to be not even sure of .. I'm so ****ed off because every time I call it's money & they put you on hold for ever without any good outcome after. I want my money that's all. Ref. after today's call *** Multichoice must stop playing games nje...nxa!