Dota 2 spectator mode question

Hi. So a few days ago I saw dota 2 on steam sale ready to download. I didn't know what is going on so I just downloaded it. And it turned out that it is a spectator mode only :/ And the problem is I can't enter any giveaway now with dota, even if i've uninstalled the spectator mode-dota, because it's bound to me like i bought it. Can i do anything? Or just need to wait for a key for doing the survey?. Sorry for grammar mistakes if i did any.