There is a really simple answer if your prizes have not been delivered via email.Click the gear icon in the top right.Click prizes and there it will manually show all your prizes.Click the Magnifying glass if it is next to the prize(If it's not there it means it hasn't been delivered yet) and it will show you your prize key.Sometimes the email support is sort of rusty,please check spam folder too if this happens.
Honest
Social
Helpful
Vulgar
Troll