To update your account infomration, please contact the billing company you signed up with by telephone.
NetBilling
Email: helixstudios@netbillingsupport.com
Phone: 1-(866)-268-0652 (From US and Canada toll Free)
International: 1-(661)-621-9181
CCBill
Web: http://www.ccbill.com/customer-service.html
Email: consumersupport@ccbill.com
Phone: 1-(888)-596-9279