My code was redeemed by someone else！

Games Other Halo
1

Yesterday I got a code of Halo finite in the e-mail,but today when I redeem it,Steam told me it has been redeemed by someone else! I don’t know why! What should I do?（But could you please answer me in Chinese?）

2

No codes for Halo: Infinite have been sent out yet. The code you are referring to was most likely a code for the first flight of Halo: Infinite that happened a few months ago.

3

> 2533274809226598;2:
> No codes for Halo: Infinite have been sent out yet. The code you are referring to was most likely a code for the first flight of Halo: Infinite that happened a few months ago.

This is correct ^