When you order the report, it gets added to your cart. You click on the cart to complete the order (it will default to your current payment information, the same that pays your subscription every month). After you pay, there is a link to download from on the order (first attachment).
Afterwards, if you go to “My Account” (big green button at the top) and click on “Downloads” at the left, you should see an option to download from there (second attachment).
Hope this helps.