Definitely not enough information, @Lucy8
If you mean change your credit card information, here's how:
- log into your self-serve account
- click the 3rd tab down on the left hand side, titled "Payments"
- in the Pre-authorized area tap "Manage Payment Method"
- then tap "Update Card Information"
- from there, you'll be prompted to enter the complete credit card information with the new information
- then tap "Save Payment Information" at the bottom
