Software to add to cart on adidas and autocheck out via backdoor

Any language is okay as long as it can add an item on [login to view URL] that releases. It must be able to solve captcha and must be able to add to cart via a backdoor link. Must be able to bypass the "splash page." You must have knowledge and experience with adidas.com. I need it to be able to use proxies and be able to test their speeds to adidas.com. I also need to be able to use guest checkout on this website. Need to be able to run multiple accounts along with a size and auto checkout profile. Need to be able to provide updates if [login to view URL] changes their site.