FNB Allowing unauthorised Debit Orders

In November 2015 I had a debit order of R 350 go off my account by a company called HDL Trading. Yesterday 05/05/2015 I Had a debit order of R 99.00 Go off my account. FNB call centre was very helpful in stopping this debit order and having refunding my money - at a charge of R 15.00 each. I do not know who HDL Trading is, nor do I know what they are debiting my account for. I have gone through all the complaints for this company on Hello Peter and everyone seems to be having the same problem as I am. R 350.00 First and then R 99.00. why must I pay for these debit orders to be reversed when these are unauthorised debit orders. and when you phone the company no one answers. This is *****!! and you are a bank - surely you should be protecting your customers somehow? if another debit order from HDL Trading goes off my account I am closing my account with FNB and will bank with a Bank that can actually help me!