from their help section:
"Go to
www.quicktender.com and press the "Registration" button;
Choose your Currency;
Provide email address and password;
Insert your Password Recovery Information (Secret Question and Answer);
Read and agree to the QuickTender Terms of Service and proceed with “Register”."
but there is no fuckin Registration button at quicktender.com... hmmmm
But wait... the homepage does say:
"If you do not have a QuickTender account yet then contact your Merchant to obtain one"
So I guess contact cake and see what they can do for you.