I watched for 4 hours, and it shows 100% completed, yet the toy is not in my toy collection.
This seems to be an issue for many players.
1) Make sure you claimed it on Twitch
2) It takes up to 24 hours to pop up in-game. Think mine was around 12 hours
3) If it still doesn't then unlink your B.Net and then relink it. I know some had to do that for the others.