Seriously you ignore her. Put her in a room make sure she has distractions in the room. You set up a schedule and you stick to it. There are no surprise visits to her, she knows when you will be there and she knows when it is her time. Food, water, litter pan scooping all on a schedule- IGNORE her when you go in, don't chase her, don't grab at her, don't make eye contact. If she catches your eye, blink several times slowly and back away.
Go in on a scheduled time and sit on the floor. Take out a book and read out loud to her. Once you have read a few pages, or a chapter, slowly get up and leave some tasty treats where your imprint is on the carpet.
Go in and lay down on your back again on a schedule- empty your head and close your eyes. Keep your arms flat at your side. Take a 20 minute nap. When she comes up to investigate (and she will) stay completely still, she will climb all over you, she may just curl up on your chest.Resist the temptation to pet her and just lie still. After, get up slowly and leave.
My latest rescues, the 7 month olds, I have been doing this with them for two weeks now. This afternoon, Chaplain- the one who always hides, came and slept on my chest. When I got up slowly he scampered off. But when I went (on my knees) over to him and reached out my hand, he head-bumped me. I left right after that.
I know what YOU want, you want this kitty to be a purring, wonderful lap kitty and she will in time. But it is HER time you work with, not YOURS. You have no inkling what horrors she might have seen or been through in her short life, so you take it slow, and you put away what you want, and you take your cues from her-
Also very important, do not confine her behind a solid door- use a screen door, or several baby gates, but she needs to be able to see, smell and get used to all activity in your home and she can't do that behind wooden doors.These are my latest rescues