In order to change your credit card or update contact information such as your email address you will need to contact the credit card processor directly. WE do not store any credit card and do not have the authority to change that info on your behalf.
If your receipt was sent from PaySystems go here:
https://cardholder.paysystems.com/
If your receipt was sent from 2checkout (most pre-November 2002 reseller accounts and all recent regular hosting accounts) go here:
http://www.2checkout.com/contactus.htm
Our seller ID at 2checkout is 29240, you will be asked.
If you do not know or we run the charge manualy at our main office call us or put in a help desk ticket.