Incorrect DSTV Debit from my bank account

What a pathetic company, they debit your account by a whole year's premium when you have not even given them permission to debit your account, then when you call to complain (as you cancelled the subscription) you get told it takes up to 10 days to do the refund on this debit............ you cannot even speak to anyone in the finance department as they "don't take calls" - how ****** convenient. If I were able to give them a -10 star rating I would , there is a reason this was cancelled and the above just proves their **** service