In order to update your payment card on your char.gy account you will need to login and go to My Account > Payment Methods or click here.
Please note you can currently only have one stored payment card on your char.gy account at a time, so if you want to replace your current one you'll need to click remove your current payment methid and then add a new one.
If you need any further help you can email our team on support@char.gy.
