Rude untitled waiter

I went with my daughter and sister to cape town fish market in waterfront, firstly our waiter was gone most of the time didnt check up on us if we needed drinks i had to bother other waiters to assist, i asked the our waister (blade) if he can bring the bill the bill comes it was 797 he sees me writing R800 total she screams how can you tip me R3 the other customer turns around to look whats happening he proceeds to say he has 4 kids what must he do with R3 i asked to speak to the manager he says fine ill get him you can keep your R3 i dont want it you could at least tip R50.( at this point tables around us are watching ) blade is a tall guy with dread locs im not happy with my experience at cape town fish market , i been here before never felt humiliated like this before