Please teach her to respect customers

Hi as I was at KFC kyalami I then got there waited for more than 10 min and surprisingly I was the only customer but then later a cashier called thapelo (lady) she was so rude to me when I asked what took u so long she then didn't even bother to answer me but kept on asking what do u want to eat then when I asked again she then turned her back on me and went away........ Myb that's because I am black and she didn't think I will complain about her virally