Lol, that was a long time back. I finally resolved it by cancelling cc payment and starting again. Second time round with different card and email address it worked immediately. Also bought second donation with same info and no problem.
But I understand the frustration, when the site still asks for order numbers stating with 6820 when it has been 6821 for months now.
Also using contact form gets zero response. Although emailing direct with full info eventually did get a reply.
I am sure the guys on here will help you, if you still have problems..