When you are attempting to log in...is that when it says you must purchase a campaign?? Of have you gotten past login?
If it is the case of the first question then it seems it is simply a case of properly registering your CD Key for the Factions campaign. At this point, if you HAVE already done this then, yes, the last thing you can do is contact PlayNC Support. Once you go to this website;
http://help.plaync.com/cgi-bin/playn...e=myq_ilp.php; you can choose to create an account, or not and simply submit a question straight away to them...
Hopefully, you won't have to bring it that far... Here are some other links to read through to make sure you have done everything properly.
GW Account Creation::
http://help.plaync.com/cgi-bin/playn...&p_t opview=1
GW CD Key Additions::
http://help.plaync.com/cgi-bin/playn...&p_t opview=1
I hope that helps, please don't hesitate to PM me with further questions or send PlayNC Support a help ticket. I always enjoy helping new players get into the gorgeous game that is Guild Wars. I'll see ya in game!
Cheers!
P.S. If you HAVE gotten past the login point, when you create an RP character you should only have the option to create a Canthan character... So i am pretty certain that it has nothing to do with the "wrong continent". If it still says "You must purchase a campaign", then it has something to do with improper game install, or improper registry of your game CD Key... Just a bit more tah think about...