Re: A new cat
Welcome to CF.
Your cat is only frightened. She has been taken from what she knows and placed in a situation she is unfamiliar with. I think your best bet would be to confine her to a small room, like a large bathroom or small bedroom. Provide her a place to hide and feel safe (covered cat carrier with a towel inside or bed to hide under. Visit her often through the day and offer treats of good food. My favorite bribe-treat is cooked chicken mixed with undiluted Cream of Chicken soup so it sticks to my fingertips for hand feeding.
Eventually, she should become more confident, if everyone is consistent when being with her. Letting her know she can trust this new place she is at. After she becomes confident with person/people in her confined area, you can begin letting her explore more of the house a little bit at a time until she is ready for the run of the whole house.
I usually start my new cats/kittens in the Master bathroom. When they come to me consistently, then I let then use the bathroom and master bedroom during the day, closing them back in the bathroom at night for me to sleep. After they are very confident, then I begin to let them explore the hallway and office, keeping them sort of 'herded' away from the Living Room/Kitchen until I feel they are confident enough with the hallway/office, then they can explore the rest of the house and have free-access.
It just takes time to earn the trust of a new kitty. Understand that she is scared and you can help her to grow confident in herself if you spend time with her.