7 Year old Black Boy Maltreated

This weekend my mother told me that she took my little; 7 year old brother to Steers last Monday. After ordering my brother's meal, my mother heard the cashiers talking about how revolted they were by the fact that the little black boy (my brother) had a white mother (but that's not even the upsetting part)... My brother was playing with his bouncy ball which then rolled under the counter. The cashier picked it up and refused to give it back to him. When my brother started crying, the lady threw the ball at him; subsequently hitting him straight in the eye!!! Without apologizing, the lady continue packaging my brother's meal. She then handed to him in a bag only to find that she has put his meal box upside down (open side facing down), which obviously resulted in all the food (cheesy chips) falling out once he opened it in the car! My mother is to kind hearted to have said anything, but felt utterly embarrassed and saddened by the way my brother was treated. I am absolutely furious and can't believe people exhibiting such behaviour is employed to work with customers!!!!