I just bought TF2 as part of the Valve Complete Pack. Where's my Proof of Purchase helmet?

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I bought a Valve Complete Pack license off an external site (Here, to be exact), which came with TF2 (which I hadn't downloaded before).
I'm pretty sure I have a premium account because my backpack has a lot of "pages", but I don't have that Proof of Purchase helmet that I understand I'm supposed to get. Is some extra step required? Or would I have had to buy the game from Steam, not just activate it there?
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How do you get proof of purchase hat in TF2?
This item was initially given to players who purchased Team Fortress 2 before the \xdcber Update on June 23, 2011, but can still be obtained by receiving a gift of the game, or by activating a retail copy of the game, such as purchasing the Orange Box.Can you still get proof of purchase TF2?
Team Fortress 2Buying orange box DOES give you the proof of purchase. No, it will give it to you when the game first came out years ago and was Pay to play, but in 2011 it was turned into a Free to play, you got the hat only if you bought the game when it was first out as a pay to play game.Does the Orange Box give you the proof of purchase?
Q. What happens if I buy a retail copy of TF2? You will automatically be upgraded to have a premium account and will be given a special Proof of Purchase hat to wear on any character in-game.Should Valve give us MORE Cosmetic Slots?
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