Invalid Report: 76561198027662955 - ([Steam] Steam Games)

I'm still not getting the answer I'm asking for here... did you give this user anything @Amir Rouichi

Screenshot of that alert? You got a game gift then out of caution thinking you were going to get the games charged back that you held back to trade the item to this user?
During this period you had a game removed?

Ok but what your saying is you were holding back trading the other user the items agreed upon because you felt the games would be charged back... while waiting then one was removed and charged back correct?

Ok I honestly see no scam here on this users part that you are accusing them of. You had an agreement of the games for the knife - you then reneged on your end of the deal by saying wait 15 days to see if games are refunded before giving the knife but that isn't how a trade works - you agreed to make the trade and you backed off on your end so I don't blame the user for refunding the game at that point.
Marking invalid since no scam happened here - if anything @Amir Rouichi you are the one that is in the wrong. I can't say the games wouldn't have been, who knows but you based the whole report on the assumption that the user was a scammer to start with and held back your end of the deal right in the middle of the deal.