Improper Format Running From Duel

Victim: (Me)
|steamID: Sneaky
|steamID32: STEAM_0:0:42955867
|steamID64: http://steamcommunity.com/profiles/76561198046177462
|customURL:
|steamrepURL: http://steamrep.com/profiles/76561198046177462

Scammer:
|steamID: owner of group
|steamID32: STEAM_0:1:37210537
|steamID64: http://steamcommunity.com/profiles/76561198034686803
|customURL: http://steamcommunity.com/id/sinoplox
|steamrepURL: http://steamrep.com/profiles/76561198034686803

Screenshots of the chat:
http://imgur.com/5SLch,vonXT,FNGsD#0 (be sure to click next, there are three pics in that album).

Note that he changed his name and profile picture after defriending me and running away.
Proof: http://i.imgur.com/g91FG.png

Story: I went on an unusual trade server looking to MGE duel for unusual hats (if you dont know, MGE is a 1v1 deathmatch mod where the first player to 20 kills wins). After a bit of asking around, he added me and we agreed (as shown in the chat) that we would MGE bet and he would put up his N&B Geisha Boy against my Ghosts Dapper Topper.

We started playing on sniper, but since his ping was 200 I asked if he would mind switching to demo. He agreed and we began anew demo vs demo. After a bit, I was up 10-2 and he messaged me (after we had already played most of the match) and tried to get me to call the bet off. I declined and said that he should not have agreed to play demo vs demo if he couldn't play with that ping, and that when I had asked him if we could not play sniper we had only been 2 points in.

I suggested that we might switch to scout as a more equitable choice, and he agreed. As soon as I had scored the 20th point (and he was still playing through the very end), he left the server. I sent him a trade request, which went unanswered. Finally, he unfriended me, changed his name, and put in a different profile picture.

My friend who was spectating (http://steamrep.com/profiles/76561198027612064) can confirm that I did in fact beat this scammer in the duel (20-7 i believe was the final score).

Also: After I suggested that we might switch to soldier, he replied "soldier", confusing me so I switched classes (which gives a free point in mge). I then switched to scout, giving him an extra free point (hence the very end of the chat log).

At this point I just want the hat . Thanks for getting to this admins