Can you SS the entire screen? we might be talking about 2 different bosses...
Also, show a SS of the skills that you have in that phase. From what I remember, during that phase, you have a different set of skills strictly to try to survive.
The tip from the Telepathic telephone, from what I remember, was basically "try to rile her up / challenge her", and I think it was one of those new skills, that then gets her annoyed and tries to grab you (giving you an arrow QTE to avoid said grab), you need to use that skill (and succeed the QTEs) 3 times to end the fight.