Had the Heroes 6 Gold Edition and today, I purchased Shades of Darkness. Booted the game, clicked unlock content, entered the CD KEY I see on my Heroes 6 page, got the message that new content was unlocked, and.... when I click "Campaign", Shades of Darkness is still locked.
So not only did Ubi find a way to completely destroy the series, they also don't get you the product you pay them for now.
Way to go, champs!
Please let me know if you ever find out a way to actually unlock your content.
The same thing just happened to me.
I also have the added benefit of Ubisoft's website telling me I had ordered it, Ubisoft's Connect client telling me I haven't ordered it and no update to my U coins on anything, including the receipt they sent when I ordered it.
Day 20. I finally received a response. Still not even a bit closer to getting a resolution, but hey, it's a start!
Here's the response: http://prntscr.com/w4shzy
I provided the screenshots they asked for, so let's see!
I did get 4 coins for purchase the game, so I will keep you posted. Ideally, I would like to be able to play the game. Otherwise, just get my money back.