1 Week and still can't buy gems
Do you have a Mac? There have been known issues with them. If so, read this thread. And look over this thread.
I’m using a Windows 7 64-bit desktop, I’ve been able to purchase Gems in the past but not as of last week when I tried.
You should send a ticket, as this might be a technical issue. Or, your creditcard issuer might have a problem with letting you do these transactions. Hard to tell unless you can see what the merchant error codes are coming back as.
ArenaNet Communications Manager
I am sorry that you’re having this continuing issue. It’s difficult to tell the source, so please submit a ticket by visiting the Support link above and then clicking “Submit a request” in the upper right-hand section of that linked page. The team should be able to assist you.
Communications Manager
Guild & Fansite Relations; In-Game Events
ArenaNet