I had been attempting to buy a copy of the digital imperial edition from the ESO store all evening. Whenever I attempted to purchase a copy of the game, once I entered my CC I would get an error indicating there was some problem with my billing address. There was no problem with my address, I tried a few times. I also tried using Paypal, and just got an error at the paypal site and kicked back to the ESO store.
After getting what looks to be form responses from the CS ticket I opened I got tired of trying to buy the game from the ESO store, and I bought a copy from Green Man Gaming, I used the exact same address and CC number I tried to use at the ESO store and it worked fine. Once I got the code from GMG, I tried to register it with ESO, only to find that I had to use the exact same billing interface I had been having trouble with to register my CC info for the subscriptions. I got the exact same errors when I tried to register my CC. So I now have a digital edition of the game, but I can't register it with my account. I have sent this info in a CS ticket, but I don't really expect anything useful since the first two responses I got had very little to actually do with my question/problem.
I figured I would try posting here in case someone would have some advice.