I took a look at your site and it seems the add to cart button works fine. You just to make sure to select all the choices - only then does it become enabled.
Or am I missing something?..
Anyway, in the future it’s highly recommended to post a specific question or problem and avoid pasting hunderds of lines of code. see here for some best practices: https://www.wix.com/code/home/forum/community-discussion/team-discussion-how-to-write-a-good-forum-post