I was once told an anecdote about an ex-special forces writer who, in the early days of his success, went into an ultra posh showroom to buy a high end car. The sales assistant looked him up and down, decided, from his scruffy appearance (designed to not draw attention to himself in dodgy locales), that he couldn't possibly afford one of their overpriced pieces of rubber and metal, and treated him accordingly.
Said writer toddled off to the bank and returned with the amount in cash, threw it on the sales desk, and said something to the sales clerk along the lines of, "NOW will you deign to sell me a car?"
It's salespeople like the one you encountered that have had me steering clear of most retail settings for years before Lockdown. I personally blessed the day online shopping became a thing. (I'll leave my feelings about our present day Blue Sun, aka Amazon, out of it for now though...)
I think it's also the reason I love the scene in Pretty Woman where Julia Roberts returns to the snooty boutique so much. Although I still think the script had her way too polite to the Snoots in that scene.
I've also had the experience, years ago when I was a (literally) almost penniless temp, of being persuaded into buying some interview shoes that were twice what I was looking to pay. They did last for years, but the point was at the time I didn't really have the money, and I didn't have the older-me nous to say firmly, "Actually, they're not quite what I'm looking for" and walk out.
But then I've always hated big-brand physical store shopping.