I don't understand how a department store has seem...

I don't understand how a department store has seemingly nobody working in it around the holidays. I have been here for 20 minutes waiting for someone to bring out the size shoe I need after having to wander around looking for someone to help me. Then the worker acted put out to have to help me! I work retail I work in this mall I get that it's tiring but it isn't even that busy and this is just absurd