Give her time, and she will adjust. It may take weeks, but just make sure every day you go into the room, sit on the floor and talk to her. Don't reach in, just sit and be with her. If you want, bring a book, and read to her, or even just sit and be still for a while each day.

She is obviously scared, and no one can blame her. You are her best hope, many people here have been through the same sort of thing, and it is so very rewarding when your patience pays off and she is brave enough to come over to you for some attention, and eventually emerges from her safety zone once she feels secure!