If you say so, There is a mod online right now he should be still there why not ask him to unbann and tell him why you were banned and if you cant contact any of the admins/mods of chat why not pm them
You shouldn't ask for admin on unless you deserve it, and since you are banned i think you actually deserve to be banned(not to be rude or anything) because you spammed the chat which is unacceptable;)