Sam's Club review: unethical behavior

I went to Sam's Club cafeteria to buy a slice of pizza. The lady at the cash register her name is Stephanie and she gave me a bad attitude and this wasn't the first time she does this to me. This has happened to me a couple of times. Also a white person that bought a pizza there, Stephanie treated that white person with a good attitude but always with me she gives me a really bad attitude. I hope the employees really pay attention to Stephanie attitude because this time she really crossed the line with her attitude.