This is a bit different but a few years ago my bf bought me a cockatiel off of one of his friends. The bird was only about a year old bit he had never been handled... just left in a cage. I kept him for about 6 months and tried everything to tame him. I even called a parrot advice line and the lady told me that unless a bird has been hand reared or handled from a very young age they are extremely difficult to tame. especially once they are in the habit of biting.
I was sad to part with him but i ended up giving him to a man who had a huge aviary full of tiels. as far as i know he is still there and very happy!

sorry i know this isnt want you want to hear.. the other option is to take her to your vet, they might be able to put you touch with someone who is an expert at training parrots (it probably can be done if you know what you are doing). you might have to pay for such a service but im sure it will be worth it for you!

good luck!