DSTV stole my money?

I cancelled my DSTV subscription and my debit order on 25 March. I was assured that the cancellation was in time so that the next debit would not be processed. I also confirmed this on 27 March via your call centre. Unfortunately the payment of R599 was debited from my bank on 28 March. I was told that it takes 7 working days to refund my money, that you *******ly took from my account. It is now 12 April and I still do not have my money. The "live chat" staff just flip me off when I query the delay.

Please return my money immediately, as I no longer need your service and you are not complying to your own service levels.