It's such a shame that you had to experience this rudeness.They shouldn't have even confronted you with that, but I'm sure glad you whipped out your receipts and showed them a thing or two. Good for you for fighting back in a very classy way.
Did they at least apologize after they saw the receipt? Also, I am curious if you purchased anything from them after being treated that way?
Im NOT going in any small LV stores again with that bag.