Yeah, mislabeling products is against the law in the US, and I'd assume in most other places, as well. I'm more inclined to think that the person telling you it wasn't really leather was lying to avoid having you return the shoes.
As for shopping experiences, I've had some lousy luck with this over the last couple of days. I'm starting a new job, and I bought some new clothes, since I have to dress a little nicer than my last job. I'm trying to find brown shoes to go with my tan slacks, and I can't find anything brown and non-leather after checking nearly a dozen different stores. I can always count on Payless for good black shoes, but I can't find brown ones anywhere. I asked an employee at one store if they had anything brown and non-leather, and he looked at me like I was from another planet, then made a dumb joke about cheap plastic sandals being the only thing I'd find.
I actually found one pair at Walmart, but they're a very narrow style, so they don't fit me. I have wide feet, so I have a hard time finding shoes that fit properly, even when they are available in my size. This is why I've never even tried to shop for shoes online - I had a hard enough time finding shoes in my size when I didn't care about the materials and I could sit and try on dozens of pairs in the store before buying something. If I bought shoes online, I'd have to buy at least a dozen pairs at once, then return the ones that didn't fit, which could easily end up being all of them.
So how bad will I look showing up my first week on a new job wearing black shoes with my tan slacks instead of brown shoes?