You can appeal at http://forums.pokefind.co/index.php?forums/punishment-appeals.22/ That’s all you can do right now
What's your IGN on Minecraft? I can check for the reason why you were banned, but there also should be a message if you try to log onto the server for why you were banned. If you would like to be unbanned, you will need to make an appeal as @PoseidonBoss stated.