aww sorry that happened to you.
usually, the MA comes straight to me [and ask me what I want] when I walk into the MAC store so there was never a chance where they thought I was stealing.
Maybe your area has more theft than other MAC stores.
But that was really messed up.
If I were you I probably wouldn't want to go back there just because of that experience.
Is there any other MAC store near you other than that one?