Meh, I've now tried to purchase Crysta and that doesn't work either. As soon as I select the amount I want to buy and hit next, it comes up with an "error 11000" message.

I've also noticed why it does this. For SOME reason, SE's site has decided that I'm from Europe when I never at any point specified as such (except perhaps when I said I prefer UK English over US English)

And nowhere am I given an option to change it and even if I was, I doubt they'd let me pick 'Australia' or even 'Oceania'. Basically, I'm stuffed until SE decides they will finally deign to respond to my ticket 3 days after submitting it.