I cannot access the game Metro Last Light Redux that has been advertised free for download, when I click the link I am redirected to the promo page but the game doesn't appear there....

Help please

In such a case you can use the store's search function to visit the game page and claim it there. Here is the direct link to the giveaway

Have fun!

Add.: When visiting the game page and being redirected to the main store page, scroll a little ways down to find the banner and click the button there to claim it!