I would appeal to the dean and see where you get with that, at this point there is nothing to lose by trying. If you are still dissmissed from the school, I would go ahead and apply to other schools in the area, and even that school again. I know around my area (Upstate NY), applications arent due in until between Jan 15th and March 1st depending on the school. If this is really what you want to do and you have a passion for it, keep trying.