Go back to basics and train her to accept you, then trust you. Speak to her quietly as often as you can. Hand feed her, but if she bites, offer the food on a spoon, talking to her all the time she eats. Try clicker training her; click when she eats from the spoon. Soon, she'll associate food with the clicker and be eager to work out how to get food. Then you click when she is calm and reward her with a treat to teach her to be good.