Bank robbing me by charging me for free lounge access.

I used my Black world citizen credit card at the lounge in Botswana on 24 May 2024. There are 2 x lounges there. I asked the Lounge receptionist to check if I can enter and if there any costs. I also told her not to swipe me in because I wanted to check the food options as I don’t eat pork and beef. The reception lady swiped my card to check but not bill me. I checked the food options and told her it was not satisfactory hence I will go to the other lounge which I did. I followed the same procedure to check eligibility and costs. No costs and I was eligible so i entered and used the lounge. To my surprise, I see a charge for R591.29 which is ridiculous considering I at 3 x chicken wings and a coke. I want a refund or I will get my legal team to start a class action with clients who have also been cheated by Standard bank in same manner. For now, I need my R591.29 and the R13.30 transaction fee credited to my account asap.