Sam's Club Merchandise Stocker interview questions

Arrived at sams for a scheduled interview at 2:45pm, it was scheduled for 3pm. I informed the greeter i was there for a 3pm interview, she radioed someone and then proceeds to tell me to wait in the cafe area. Im pretty patient, but i shouldve known better. Waited till around 3:45-3:50pm. Yea, awful. I know. Went up to one of the self checkout attendants (neon vest) and told them i had an interview at 3 and its already 3:50. She calls over im assuming supervisor (blue vest) and then proceeds to ask me what position im there for. I tell her merchandise stocker position and she tells me the position was already filled earlier today. Great, thanks for wasting my time.