I have tried support with no luck, sadly. It's been almost a month of trying a couple times a day and all I was told is that the site "may" be going through maintenance. Some cards work fine, others just give the error I listed previously or another error that I sent to support just saying it failed to create an order. Support also gave instructions on how to pay but... when you can't even get past the "Buy" button without it erroring out, it's hard to deal with any of the payment stuff. I hope at some point things get better with the site, but my experience so far has been less than stellar and it's looking like I'm better off just giving up and moving on instead of continuing to waste time.