Updating the card information for payment

Hello, 

Thank you for reaching us on this channel. We are really sorry for the inconvenience caused.
We would request you to reach our sales team through phone or chat. They will check and help you to update the payment information. 
Visit support.avg.com/support_sales?l=en to reach our sales team.

My card has expired, so I am trying to renew it on the page below:
AVG Account
However, even if I press "Update payment card", I can't proceed further.
What should I do?

Hello, 

Thank you for reaching us on this channel. We are really sorry for the inconvenience caused.
We would request you to reach our sales team through phone or chat. They will check and help you to update the payment information. 
Visit support.avg.com/support_sales?l=en to reach our sales team.