Unknown debit

I recently received an SMS of an debit order of R95 that went off my account, so today I decided to visit the Capitec branch in Secunda asked for the consultant to check for me what is the debit order for he said he doesn't know but is possible to think my money is safe with you guys yet when I ask who is taking my money you say you don't know and to my suprise it's not just one debit it's four debit orders that I don't and my bank doesn't when I asked for them to be reversed I was charged R 40 per reversal for something which I know nothing about, my question is who authorised these people to take money from my account. And please educate your staff never say I don't know to a customer