How discriminatory of them!! SO many hairdressers are dyslexic and dyspraxic and they manage just fine! Its not like youve got advanced parkinsons and will suddenly jerk your scissors into someones eye! That is really awful that they have turned you away for this, can you imagine the state of things if everyone with some kind of difficulty/disability wasnt allowed to be educated?! Shameful.
Im not dyspraxic but im clumsy as f*ck always dropping my comb but never have I caused any kind of harm with my scissors or any other kind of equipment because I make sure to be careful. It is something you learn as you progress you become subconsciously much more careful with equipment around eyes and the face in general.
Kick up a stink and take your custom to another college if you can! In the meantime maybe practice some exercises to improve your coordination, computer games, hula hooping or juggling, riding a bike etc are all great skills that really improve your spatial awareness!