Laugh at me shame on you

Simply Asia Clearwater Mall the service was very slow however our waiter came over and was polite.we came through on Monday and Wednesday for the half price sushi. Since it's locked down and the level's are getting sticker we took the chance being there. We ordered the sushi and when came time to pay our bill was R90. It was literally my last Hundred Rand, the waiter unfortunately didn't get a tip so I felt bad because I needed the R10 to pay for the parking. I noticed the waiter go over to the manager and whispered something and at the back where I was seated and came out laughing. I didn't want to assume but then I noticed the till slip was in the managers hand and not the waiter. I put 2 and 2 together and I realised I was the reason for them laughing. Thanks guys for your appreciation, although I didn't enjoy being laughed at.