Let’s try finding your affiliate link a different way. You’ll need to have an account on LinkShare, which it looks like you do.
After you log in, go to “Links -> Get Links” in LinkShare, then click “US iTunes, App Store, iBookstore, and Mac App Store” in the list of links.
You’ll then come to a page that has a blue header and 4 buttons on it, the first one should say “Link Maker Tool.” Click that button and it will open a new page at itunes.apple.com. Near the bottom of that page, there’s a blurb that says something like, “Your affiliate network is…” The link at the end of that blurb should be your wrapper. Be sure to leave off the period at the end of the link.