Bank refusing to pay for ********** transactions

I reported ********** activities on my business credit card to Standard Bank that transpired on the 13th December 2022. The amount was over R 40 000.00, the reference number for the case is ***. Standard Bank (Yasmin Msanyera) conducted an investigation and now they are saying that I am responsible for the transactions that occurred due to Garmin pay. I was NEVER responsible for any of the transactions using the Standard Bank business card. Our company has been with Standard Bank for over 50 years. I was not responsible for any of the overseas transactions. I did not get any SMSs notifications for the transactions. I do not feel that this is fair in any way as I had nothing to do with the ********** use of the credit card. If this is how Standard Bank treats their long term clients, we will be finding a different bank.