payment integration in divi landing page

Hello guys, can someone help me with integrate payment in one page ? I saw this on this store. They are using woocommerce and their landing page was created with divi.
They somehow integrated the payment in one page. How can i do that? Can someone help me with that? I am whilingly to pay for this information. Thank you!

https://s-mania.it/v1/retro-console-portatile-v2

Code (markup):

from eCommerce https://ift.tt/2KNposJ
via IFTTT