I think you feel that you are being treated unjustly. Whether or not you are, I think you would do well to accept that you need your tutor and professor to mark your work, give you a pass and perhaps to give you a reference when you finish. I would suggest you apologise for calling him an ********** and acknowledge to the board that you did not handle this well and that you have learnt from the situation. I don't think you will ever be able to persuade your tutors into believing your view of the situation, some things we just have to let go.