What does she want from me? to torment me forever?

If she really is a master manipulator like you said, then yes...she does want to torment you until you give in. People like her will stop at nothing to get what they want...they don't know the meaning of the word "no." Keep doing what you're doing...ignore her calls and emails. If she was a real friend, then I would suggest trying to work things out...but she is a manipulator, so keep her out of your life. She will eventually stop if you stand your ground. Life is short, and you don't need people like her in your life.