Look here if you have bought revoked gifts:

1. Accounts listed above includes the owner of this account and one of his alt. trading account.
2. If you have bought revoked gifts, contacting the seller via these accounts for resolution is more effective than contacting Dispenser.tf.
3. If needed, these are the accounts to be reported to Steam support.

1. Select the game you want to buy
2. Select items that will pay
3. Click 'Proceed' and bot will send you a trade offer with your keys
4. Bot will send the game after trade as a gift