The first gift, but encountered problems

Has not "promised"???

The prophecy has foretold the Promised one or Chosen one shall arise and become the winner of a giveaway.
The promised one that is the winner should have his e-mail displayed on the screen of the giveaway.
You shall send that winner the gift by that selected e-mail oh great a mighty one.

Marriage first, gifts second.

If he has not yet accepted your friend request on STEAM, wait another two days. People do not always check their STEAM accounts.

Mother Jenova will guide us all to the Promised Land, where all Steam Gifts are given and the field is rich in Mako energy and 75% discounts

In your giveaways section, you have, view created.

There you can see your giveaways, if you click where it says "Send gift", you will have a button to confirm you gave it, but at the left side, you will see his email address. You can send the code that way, click gift sent.