Hello- sorry to hear about your situation. A similar thing happened to me in that I was told to submit my work early for the review by my supervisors who told me it was good enough, and then the examiners told me to completely rewrite the whole thing in two months. So wasnt very pleased- but on the plus side, I did do it and I have now passed. It sounds to me that your supervisors should have given you more input (and mine should have given me more!), but, and though its easier said than done, try not to feel too despondent- its not really a reflection on you, just how you have been guided in the wrong direction. I now feel much more confident in my work and although it was very hard it was definitely worth rewriting, so it can be done. Good luck..