A little frustration

I have now jumped all the hoops necessary to apply for graduate studies at the University of Alberta except paying the registration fee. It's not that I haven't tried to pay the registration fee. It's just that I can't figure out how to pay it. I e-mailed my contact in the grad studies office and she sent me a link - but the link just states that you must pay before your application will be considered. But nowhere can I find anything that says "input your credit card number here" or anything like that. I guess I'll e-mail her again tomorrow and try again. You think they'd make it easy to give them money!