I was on the world Darkhaven at first, then i wanted to switch to Devona’s rest so i could play with a friend. After I restarted Guildwars, it said that I was on Henge of Denravi, I was wondering if this was a common problem and if there was anyways I could have my world changed sooner?
You can certainly file a ticket to Customer Support; it is always useful to have records of this kind of situations. On the other hand, do not build your hopes up, as Loli Ruri mentions, as you need to wait for a week in order to make a new server jump.
Thanks for your understanding and sorry for the inconveniences.