IF you're still having issues with the game, here is the link tot he tech support PHONE NUMBER. The number is 1-800-592-5499. I'm sure they can get it cleared up as it seems like a common issue people are having.
I finished Act I on a European server yesterday. If this group will be playing together as a team I'll consider making a character on a US server as well. I'm not sure how multiplayer games would work though, I'm still playing single player.