I bought a $20 vanilla card because I do not own a credit or debit card and I do not know of a store near me that carries the gem cards and every time I enter the credit card number it tells me that it was declined I am just wondering why because I have done everything on the vanilla card website and it still does not work.
I believe that you should contact Support by filing a ticket through the “Ask a Question” tab on that linked page. They should be able to assist you.
thank you guys for your responses it helped a lot and i was able to get the card working, according to the guild wars people i had tried to make the purchase too many times that it blocked me and they unblocked me and told me to try gain and now it has worked and i had registered the card and now i have my gems. thank you guys.
Thanks for the update! I’m glad it all worked out fine for you. 
