You can change your password if you login to the official forums found at: https://account.guildwars2.com/login and click the Account link, then click Edit Profile. You can also see what your account name is but if you have logged in you should know it allready.
ArenaNet have superb support so contacting them through the link Sans gave you is the best option to sort the issue out. Good Luck.
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Is there any way to change my username or email address?
We know that some players do not have a valid email address for their linked Guild Wars and Guild Wars 2 account name and want to change it. At this time, it is not possible to change your Guild Wars or Guild Wars 2 account name or email address. However, we plan to have this ability before Guild Wars 2 launches.
http://support.guild...26-password-faq
We know that some players do not have a valid email address for their linked Guild Wars and Guild Wars 2 account name and want to change it. At this time, it is not possible to change your Guild Wars or Guild Wars 2 account name or email address. However, we plan to have this ability before Guild Wars 2 launches.
http://support.guild...26-password-faq

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