Ty guys, i think steam solved the problem already, if one of you still having any issues i suggest open a ticket support informing this problem with all data needed to help steam solving this with agility (date of the trade, item traded, price paid, my profile your profile and the profile of the guy who sold me the game in the first place)

Here's some useful data, in case of any of you still having the problem:
My Profile: http://steamcommunity.com/profiles/76561198003258541/
Talback's Profile (the scammer who sold me the games): http://steamcommunity.com/profiles/76561198073360663

You guys can also add me on steam so i can help u with building a post on steam support providing all info needed by steam to restore ur lost items. Thank you for patience guys and here is the Steam reply.

Opened a ticket on steam support on Wed, 26th Mar 2014 8:00 pm and got this reply from steam:


3 Message by Support Tech Derrick on Thu, 27th Mar 2014 2:49 pm
Hello Eduardo,

Thank you for contacting Steam Support.

The games you received via trade were purchased fraudulently and removed from your account.

As a customer service gesture, we have restored all items/gifts that were associated with the trade.

Additionally, your Community Market listings were removed and returned to your inventory.

To avoid encountering this issue in the future, please be aware of trades that are excessively imbalanced. Make sure that what you are trading is of similar value to what you are receiving.

You need to open a ticket, informing what u lost, when u lost and how much u paid for it... otherwise they wont give ur stuff back, do it... its fast and they will reply in 1 day.

I mean, its on steam contract, they are supposed to give ur keys back, not me...

I open ticket yesterday and stil wait support report to me.

Edit
Steam Support send item back to me thank you.