Tell her she is dumped. When she calls you to lie some more, you tell her point blank that you just don't care what she has to say because you don't believe her anyway. Hang up the phone, and don't answer if she's on the caller ID. If she gets through, tell her you don't want to talk to her, and hang up. Get a new job if you have to in order to break off all contact, but she probably will quit soon anyway, and move on to a new place with new people who won't know her past.
What I'm saying is run fast and run far. Don't give her any more ammo. The less you say, the better. Ignore her and any attempts of hers to "get back" at you, like new boyfriends, etc. (real or made up).
Sit back and do nothing more than pity her for the sad pathetic person she is.
Good luck
P.S. I hope you don't have a nice car or expensive tires, because she is not well, and she may try to make things ugly.