It's been 3 days now and it says Invalid Charge Method. I've used the same card for 8 years with no issues. I've updated the valid card payment but nothing has changed.
It's frustrating as I'm not sure what to do next.
Go to your buyer side of your account and update your credit card info there. That is what worked for me (but that was about 18 mos ago so it may not work any more)
Amazon normally wants a CREDIT card, not a debit. Otherwise try to put another Credit card, from a real bank.