I bought a game last week on sale from Steam that used UPlay DRM and the CD key was found to be "already used." Opened a ticket with Ubisoft Support after Steam

I bought a game last week on sale from Steam that used UPlay DRM and the CD key was found to be "already used." Opened a ticket with Ubisoft Support after Steam said they could do nothing for me and it took a week for Ubisoft to say "sorry we can't get you a new key" and yet Steam is still selling it.