The only thing I've gotten are "Aren't kilts are supposed to be tartan, not one colour?" But don't you just love know-it-alls?

I am sorry that happened to you. Perhaps she'll come to learn her error and not make the mistake again.

At least you know you're right. That's what matters. And I think that it sounds as if you handled the sitiation well. You did all you really could do. But some people are just too thick-headed and closed minded.