Lost faith in African Bank!!

This Bank put through a debit order of R3285 on my account without permission!!! I have never agreed to that. We had a previous arrangement and they chose to ignore that and put through the whole amount without my permission!! I am a pensioner and my husband has lost his job during the Covid-19 pandemic!!! I think this is absurd and the public may loose all faith and trust in this Bank if this is the way they operate.! This action leaves me with nothing in my account! If necessary I will refer this matter for further legal action!!!!