Kokomo Beach Bar Langebaan - Happy ending

I visited Bokomo Beach Bar on the 5th of August 2022. I was double billed because of a misunderstanding w.r.t. the tip for the waiter. I went back the next day to try and resolve the problem. They explained to me that I must contact my bank. My bank requested an authorization letter from the restaurant. The staff at the restaurant was very helpful and the problem was solved after I received the letter the same day of my request.