Tesco Sales Associate/Cashier interview questions

I hah an interview at Tesco, the process was really long. They ask my to go to the shop and say that I had an interview, but the staff didn’t know exactly what to do, at the end they bring me in the staff room and a rude give me a questionnaire to complete; he said all wrong thing to me . I had the interview and then they bring me down for the trial, and instead of show me how they place work they just let me stay there while the staff was talking.