In order to update your Credit Card details you will need to:
- Login to your account on https://watch.passionflix.com/log-in
- Then go to your Passionflix payment settings in your "You" section
- Select Payment and click on Update Payment
- A new window will pop up so that you can add and update your Credit Card details
- After filling all the information click on Pay
If your credit card is rejected during the process please check this article for further guidelines.