Unauthorized transaction

I wrote the following to FNB 2 times already and have not had any feedback, I'm trusting that this is the last time and that my request will be attended to. I am writing to follow up on a previous query/complaint that I submitted between the 11th and 13th of March on the FNB website. Unfortunately, to date, I have not received any reference or feedback regarding my concerns. The matter I wish to address pertains to a transaction discrepancy involving a transfer of R2500.00 that occurred on the 8th March 2024. I received a notification of this transfer at approximately 01:29am, however, upon reviewing my account balance. I noticed a disparity from my previous calculations. I meticulously monitored my account activity and did thorough calculations which clearly indicated discrepancy of missing funds. This situation has not only caused frustration but also significant inconvenience. I urgently require clarification on this matter and assistance from a representative who can guide me through each step to attain a clear understanding of what transpired. It is also disheartening to experience delays in response as it only exacerbates the situation and erodes trust in the banking service provided. I humbly ask that you prioritize this matter and provide feedback.