Disgusted at customer service

Last week i was in the line waiting my turn to pay for my items the lady before me paid for her electricity bill and she used cash so the lady that was after me kept on passing 200 rands notes to the cashier for smaller notes and the cashier was assisting her oblivious to my turn so i made mention to the cashier if she can please do that when my turn is over she then said to me that this isnt my country and that i should go back to India i suffer with terrible anxiety i just walked out the store in total disgust