We take account security seriously here at GrabOne, so if you've accidentally saved a card you weren't supposed to, or just want to remove expired cards we can help you with this.
Ensure you are logged in and head to My Account:
To edit, simply click on the blue change button above your current saved card details and select Forget
For security reasons you are unable to manually add new credit card details. When you grab your next purchase just click the option to save as a token and your card will be loaded for next time.