Dis-Chem at Birch Acres Mall in Tembisa the cashiers there has a bad tendency of using sign language to communicate with the customers

Dis-Chem at Birch Acres Mall in Tembisa the cashiers there has a bad tendency of using sign language to communicate with the customers. I wonder if they understood why they have been taken to the interview if they were! i didn't report to the manager as i know if a store manager is a black person i waste may time.