NO RESOLUTION TO MONEY TAKEN OUT OF MY ACCOUNT BY OTHERS

FNB are not resolving my incorrect transaction issue where money was taken from my account at midnight at a garage on the 27th of June and they keep telling me it was a transaction made on 04 July 2024 and that the provider only banked it the day before the 27th. No such transaction was made from my account on 4 July 2024 and after paying a visit to the provider, they confirmed they do not leave transactions for banking for that amount of time - exactly 21 days? After numerous secure chats, emails with proof of transaction history on my account, FNB insist on not returning my money. Unfortunately I had high views of FNB and their banking etiquette, but at this point I have nothing but disappointment at the mere fact that they will let someone get away with taking my money. Even after requesting a manager or supervisor to contact me to resolve this, and asking them to contact the owner of the garage, nothing has been done because they "believe" that I am wrong, but the proof is in the pudding and I want my money back. That's it!