Capitec Unable to reverse ********** debit order

2 weeks ago I got a notification that R668.22 was debited from my account. I currently am unemployed and do not have any active debit orders on my capitec account. I went to the branch in Ottery Hyper to have it reversed and to my surprise was told they cannot reverse it, nor could they advise me who the company was that debited me or provide any recourse. I was told to Google the company (whose details i don't have apart from the reference in the sms notification) and contact them. Even if i were to find the company that debited me, the fact that it was unauthorized in the first place begs the question what chance do i have of them returning my money any way? I have no confidence in capitec as they cannot even protect their clients money. How can a bank be unable to reverse a ********** debit order? This makes no sense. Am i supposed to just write this money off?