FNB refusing to refund my money after ********** transactions

I reported a ***** case weeks ago on my cheque card on the 27th of August 2022.I woke to a shock as I saw transactions which went off my account first it was R33 and again another R33 then R1724 and again R862 and R689 in a period of about 4 hrs just after midnight there was another R1724 was reversed. I noticed around 6am and immediately reported the case to FNB ***** department who told me the turn around time is 7 to 14 days.I have been calling time to time and was told the investigators are busy with the case.Today I called in was on the line for over 30 minutes then I decided to log on the app on chat that’s when I was told that my case was completed and rejected and reason given was that the transactions I’m disputing are authenticated with an OTP which I never received though the money went off. It’s very strange and shocking as the 2 transactions of R33 have been refunded.I have requested proof that I received the OTP and from which medium but they have failed to give me that or any answers.I have been with the bank for several years but this is the worst treatment I have received.I have worked in a bank before and now I’m Made to look stupid after waiting for days weeks and only to receive a refund of R66 and at no point did any ***** department staff call me to assist with their so called investigations. This is a shame coming from a well known bank of high standing and profitable but only cares for itself and doesn’t care about its clients who have made them where they are now.