Well, let me try and narrow it down. As far as quests where you go out and do stuff, did you do "Death Marks" where you go after her ex's? How about "As Far as you can Throw her" where you confront The Wheezer?
Those sound somewhat familiar but it has been a long time. I know I had the "As Far as you can Throw her" quest and if the other one is before it then I am sure I did it too. I felt like I was mostly done with her story. Surprised she never unlocked.
I don't understand why I can't get someone from customer service to respond to my ticket. Its been over a week.