Finally paid in full today. Still unable to do it online. It just does not show when I sign in. Calling in payment didn’t go smoothly either. First agent was convinced I had booked via a travel agent and refused to take payment. I just hung up and called back. Next agent took payment, but somewhere along the way my email address was wrong, so that had to be fixed to get an email confirmation of payment. That agent did say others were having similar issues of not being able to pay online. His explanation was lots of people were trying to do transactions online... okay whatever!