Good day, so if you have already redeemed them over at Foundry, they should be over in the Bazaar
To redeem them you have to link the code/content with your account over in foundry, and then afterwards it will be accessible at the Forge, or you can upload it manually.
The e-mail you get from purchasing should have redemption instructions.
Hopefully that helps you, if you need any more help just continue asking 