Unfortunately, many people only find this website and forums after they become banned, and aren't sure what to do. Your best recourse is to post a non offensive, fact based account of what happened. Tell your side of the story without disrespecting anyone. Proper spelling, punctuation, and not typing in all caps will also make you look like less of a douche. If you do not speak English, there are subforums to post in and somebody can translate. The admins will look at your side of the story vs any demos and UAN members that were present's version and make a decision. If you screwed up and apologize, and you haven't been in trouble here before, generally all is forgiven. If you are causing problems repeatedly, hacking, or being disrespectful to the point of no return, don't expect much sympathy.
They do when I start refusing to answer questions and direct people to them. I answer the same questions repeatedly, so this is my way of avoiding having to do that because I'm an impatient prick. Yay!