Show up at the store and kick her ass.
Just kidding, lol!
Actually, I agree with 33girl that you should kill her with kindness. Go to your friend's store, meet her, start to talk to her. Be really sweet. "I hear from my friend that you're an AXiD. I'm an AXiD, too from Blank College. It's always great to meet sisters from different chapters." Tell her what great things you have heard about her chapter. Invite her to lunch or some other get together. If she is receptive, that's great. If not, you made an effort. Don't be confrontational.
BTW we had a great AXiD chapter at my college.
