Complain - ********** /Unauthorized Debit orders

I contacted Outsurance to rectify a mistake they might have made. they keep debiting my account with a reference OT*** that 1651 and R754 last month. I do not have any business with outsurance whatsoever. I even contacted them to find out what this would be and they confirmed they do not even have my ID number on their profiles. The Lady I spoke to was not even bothered, just told me there's nothing they can do. All these companies are my Bank FNB are just useless when it comes to clients protection. How is it that they do not verify bank details before authorizing a debit order? I am basically paying someones insurance and they are just cruising wherever