Accused off always buying with **** money

As usual I buy my lunch at Pick'n Pay, to my surprise when I approached one of cashier's to pay for my lunch I was told that my money is **** money, I haven't been this humiliated in my life the cashier was screaming at me called all of her colleagues telling them how **** my money is and that we Sterkinekor staff members always buy with **** money and that this issue was even raised in their weekly meetings. I want the manager to call me back to explain to me these allegations.