Most Horrible attitude from a staff member

We just come from Side Step in Maponya Mall, when we got there we found two girls(staff members) standing right in the middle of the door; I thought they were customers because they didn’t move out of the way seeing that we wanted to go in. I wanted to buy a New Balance which I saw it was R500. There was a price tag written R500 there. The guy who fetched the size for me told me that it went up. I asked how’s that my problem because I see R500 on the sneakers, when we got to the till point this girl told me that I will never get it for R500 and I can leave both the pairs of sneakers if I want to; I’ve never seen a person with such a horrible attitude in my life