just goto support.guildwars.com, fill out a report detailing your territory screwup and answer any questions they may have. Normally they are pretty good about it if you treat them respectfully.
Ya a guy in my guild accidently got stuck in the Euro server because he didn't know there was a limit of how many times he could switch. He just e-mailed support and explained the situation and by the next day he was back in America. But I dunno if you should go back to Euro servers Wolf. When I went for a vacation in the Euro servers I found that finding groups for missions and pretty much anything was very hard. I had to do Sanctum Cay with some french dudes and if not for Babel-fish I wouldn't have been able to save our team by telling them that the bonus was evil.
Europe isn't such a bad place ya know
just because all europeans don't speak the same language and that some places have no one in them any time *cough Ring of fire french 1 cough*
doesn't mean that we have a bad teritory
Also consider the time difference, if you are in Europe, then the Euro server is good, but if you are visiting from the US, there is a good chance most people are in bed...