After logging in on the login screen, you will see the Economy section on the right-hand side of the profile page.
Under 'Additional Actions' are 'View Order History', 'Redeem a Key', and 'View Inventory'.
Click on 'View Inventory', and it will list your Kickstarter and other purchased items from most recent to oldest. It should also list items earned in-game.
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.