I have purchased the new battle for azeroth bundle digital deluxe edition but i can't find the cd key anywhere or even the game.
My transaction history shows that i purchased the game and paid for. Where can i find my bundle? Do i need to download the game first or add a subscription?

Did you buy it trough your blizzard account? If so it should show up in your "Games" tab on battle.net or in the app installed on your computer.