Hello,
Unfortunately I have an outstanding invoice as my credit card has changed,
Unfortunately, I always get this error when I try to update my card at https://app.box.com/update.
An error has occurred while processing your enquiry.
We were unable to process your enquiry. Please check that all fields are filled in correctly and try again, or visit support.box.com for further assistance.
I have also sent an e-mail to billing@box.com twice without success.

