Debit orders

Hello

Ive been a client of FNB since 2015 and Im very disapointed in their service lately.

During Dec 2019 there was an unauthorised debit order of R503. I tried to despute this debit order and they said it can take upbto 40 working days for some reason. It is 5 months now and still nothing. I contacted them numerous times with several messages and emails and still no one can give any awnsers. Again this month another unauthorised debit order of R1200 went off and after many attempts I cant seem to reverse or despute this debit order once again. Ive submitted the despute last week and still didnt get any feedback. The last conversation I had with my team of bankers they said they cant reverse any debit orders. Why not? How does this work? Shouldnt my bank take care of my money?

This is unacceptable and I want awnsers.