Has anyone other than myself had some very BAD experience with cosmetics counter salespeople?

I was at the Chanel counter yesterday looking at lipsticks when the sales ociate gave me a dirty look, rolled her eyes, and asked very rudely if I needed help. I actually needed a foundation and chanel is my favorite. I intended to buy one that day, but her attitude just totally put me off. She didn't have other customers so it's not like I was wasting her time. I think she umed because I am young and dressed in a t shirt and jeans that I can't afford anything there... what an ******.