Canceling DSTV and still being charged

so, my husband and I decided to cancel DSTV. And so he called them in February to cancel it and was told that he can't cancel in the middle of the month but only the date before the account is debited. So in March he did that. And yes, DSTV cut us off as requested at 00:00 on Saturday night. And yet today, my husband's account was debited? They are so eager to cut it off, but yet can't even update their system not to debit the account!! Then it takes 3 days to give it back .... That is really not on! You have your rules and you make us stick by them, but then you can do whatever you want to us! That is truly not on!! You can only cancel on a certain day?!?! ***?!? But don't worry, we will debit your account anyway!!