It would do no good. You are dealing with buracracy, my boy! The people who have your paperwork were employeed because they helped some chicken get elected. They don't give a hoot whether you get into school or not. They only want a cush job and if you go to plead your case, they will have a somewhat less cush job and they will hate you. Your app will fall accidentally into the incinerator.
Being on any wait list for grad school is a kiss of death. They fill their quota and then put all other apps in a stack. Dust settles on the stack. Rodants pee on the stack. If there does come an opening, some political hac has a son who would never even make it to the stack. They will take him. The stack will slowly get smaller under the weight of dust and slime until someone carelessly shoves it into a box and sends it to some storage room where it will sit forever.