Monthly accounts may update the credit card on file at any time by following the steps below.
1) Log in to Reviewbox (https://beta1.getreviewbox.com)
2) Click Account on the green left side menu
3) Click on the Payments tab at the top of the screen
4) Under Current Subscription Details, click on the Pencil icon on the right side of the page, and you may enter your new card information there.