OH how I sympathise. When at University I took a job in a store over the Christmas holidays. By the first day I was still smiling but weakly... by the second I was snarling in time to the music, by the third snarling in time to the music AT the customers.....by the fourth they took me away forlornly whistling Santa Baby through my teeth and pretending I was an elf. Please stop this inhumane treatment to shop staff and customers.