FNB not willing to assist with the money leaving my bank account

Yesterday evening I received a notification of an transaction that I did no do or had any knowledge about it. So I immediately went through my bank transactions and realised that in the same month 2 more transactions were made from the same company/name and deducted money from my account. This morning (1 December 2021) I went in a FNB branch in Potchefstroom seeking assistance and reversal of these monies taking from account, I was sent to a online banking phone and was told by the person on the other end they cannot reverse those transaction all they can do is cancel and report it as *****. My frustration is with FNB I have lost money in their bank of which I trusted while banking with them my money is safe and I'm to accept that my money is gone and they cannot reverse and that's it. I cant help but believe this bank is unwilling to assist with my money that is being withdrawn without my authority. Now I sit with no card and clarity as what is drawing money out of my account and is it possible to get details of this company FEEL THE BASE BLAST seeing that FNB won't reverse the money perhaps there I can get assistance.