You are in the wrong. So she said a bad thing, and she shouldn't have, but what you've done is horrible and wrong. When people say mean things you're supposed to walk away or explain to them why they hurt you, not hurt them back. That's what grown ups are supposed to do.
You don't have the right to teach lessons like that just because you have powers that other people don't. That's what bullies do. You should bring her back right now because it's the right thing to do, to show you're a good person, otherwise no matter what she said or did, you're going to end up the one in the wrong.