Thank you for using TeamViewer and posting in our community.
You can go to the page for payment change: https://www.teamviewer.com/en/licensing/subscriptionPaymentChange.aspx
login in with your existing invoice number and your account email, and you will then be able to change your payment information.
Hello, I've exactly this problem too. There is no change mechanism on the page from anwer. Exactly this page no exist! How can I change the number of my credit card?