scraping expert for this site (https://www.grosbasket.de/)

the freelancer need to be familiar with site for scraping.
need to get the two data on the checkout page after adding the product to cart
but for now the script is not getting the checkout page url correctly. it gets the wrong url
if you can do this job faster, let me know.
Tips:
Problem is..
1. it is not correct way to request a directed /firecheckout/
2. find a solution to directly create a session and track the redirecting paths
if you set it correctly, the problem will be solved easily
thanks