After signing in, you will see the Inventory section listed at the bottom of the Account Dashboard.
View Inventory
Click on 'Inventory', and it will list your Kickstarter and other purchased items from most recent to oldest. It should also list items earned in-game.
Order History
Under 'Order History', it will list all of your purchased packages and items. The only exception is the Kickstarter Packages since the purchase was added with a Key.
If your purchases or items are not displayed or are missing, please reach out to support here.