FNB' s bad service

I’m disgusted by the service received from FNB, to think that I have been using the bank all my life. On the 26 January 2023 there were 2 transactions of R4339.81 each made with my card to a company called Argos LTD. FNB send me an sms stating that they suspect *****ulent activity on my account and asked if I authorised the transactions, I selected No. The following day I go to the bank to report the transactions ( Dispute ***-***). I was informed they will investigate and come back to me. On the 3th of February I get an sms stating that my account will be temporary credited within 24 hours pending an investigation. 1 transaction amount was paid. every week I had to call them to follow-up and every time I get to speak to a new person who doesn’t have a clue what I’m talking about even after giving them the dispute reference number. On the 28th February they paid the second amount. A month later I get a message that the merchant has refunded the amount back to my account they will be re-debiting, they debited the R4339.81 again and I didn’t receive any funds from the merchant. So I would like this matter to be sorted as soon as possible as this is affecting my financial planning. I’m even considering moving banks as I have been dealing with the same issue for the past 3 months