While the SA, being (ostensibly) in a customer service occupation, should be primarily concerned with treating every single client well, you've also noted, PbP, that you and this woman had a tenuous relationship at best. She was a lousy SA to you. You tried to be loyal and she didn't appreciate it. So, it's understandable that you shifted your purchases to Paris. But you also made the executive decision to point out to the SA that you have done so. Perhaps it will open her eyes a bit. Probably not. Letting her know she blew it with you is your right, of course, but also, to this woman, it was a provocation that she didn't have the self-control to resist. Had you any desire to continue buying from this store, lulilu's take is relevant. As you don't, this last exchange confirms your reasons for disliking this woman, and your relationship at FSH is clearly The One.