Im not aware of a different payment option, but if you contact the backroom staff they may be able to help you with payment.
Use the "contact us" link at the bottom of the desktop site and this will generate an email to the sites administration. Also a useful link should you ever not be able to access your account and need to contact someone.
Im not aware of this link being available on any of the web apps or the mobile version of the website. It must be the desktop version.