Er, I think that's more of a question to speak to the staff about, Lunawolf. Send a PM to one of the mods or something. You'll find their usernames here:
http://feral-heart.com/index.php?option=com_content&view=article&id=28&Itemid=52I doubt they'll do anything, though. Allowing your friend to play on your account having not read the rules or anything whilst you were out of the room was asking for trouble. Moderators don't undo bans. You'll just have to wait out the month, then speak to your friends.
Oh, and mods often don't believe tales of "my friend went on my account and swore; it wasn't me".