Invalid ? (?)

Victim:
steamID: Knife_cz
steamID32: STEAM_0:0:12097745
steamID64: http://steamcommunity.com/profiles/76561197984461218
customURL: http://steamcommunity.com/id/knife_cz
steamrepURL: http://steamrep.com/profiles/76561197984461218
(That'd be me)
Scammer:
steamID: HoOoDoOo
steamID32: STEAM_0:0:49909092
steamID64: http://steamcommunity.com/profiles/76561198060083912
customURL:
steamrepURL: http://steamrep.com/profiles/76561198060083912

Proof:
http://i.cubeupload.com/NXrNuZ.png
Yes, I know it is in my Language - Czech. But I can do a simple translation.
18:20 - HoOoDoOo: Yeeesss ?
18:20 - Knife_cz: End your current trade and trade me.
18:20 - HoOoDoOo: wait
18:21 - HoOoDoOo: what
18:21 - Knife_cz: I said I wanted Strange Dead Ringer, you gave me normal one.
18:22 - HoOoDoOo: Lol ok, but i wont give u anything back
18:22 - Knife_cz: Oh? So switching Strange Dead Ringer in trade for normal one isn't scamming?
18:22 - Knife_cz: Return it you idiot.
18:22 - HoOoDoOo: lol bye
18:22 - Knife_cz: You have report for scamming.
18:22 - Knife_cz: Idiot kid.
18:23 - Knife_cz: Look
18:23 - Knife_cz: Strange Dead Ringer
18:23 - Knife_cz: And normal Dead Ringer are two different things
18:23 - Knife_cz: And yes it was my mistake to be that stupid and belive fellow Czech not to switch two items while I was not looking.
18:24 - Knife_cz: I thought you wouldn't scam a fellow Czech.
18:24 - Knife_cz: But that you will be that big a✿✿✿✿✿✿ not to return the item, after I politely asked you to return it, I'd never except that.

Basically, as I do not have the picture of trade. He switched from Strange Dead Ringer to normal Dead Ringer while I wasn't looking, I really trusted fellow Czech..because well they are /mostly/ friendly, and there aren't many Czechs around.
And well my kind of 'rage' in the chat is kinda excepted, I gave him Genuine Brain Bucket + Refined...for a normal Dead Ringer..

God, why can't we just have normal friendly/good traders?

Oh boy how do I edit? I infact gave him only the Genuine Brain Bucket, not along with refined (That was my previous offer, when he said that the hat is enough)

Hello, I would like to also express to trade when purchasing the server wrote Death Ringer wrote Strange that he needs even if no written evidence please of you as you deal with this case. Thanks - HoOoDoOo

A polite person would fix the misunderstanding he done - soon as possible, not laughing at his face. After switching two different quality items on purpose, for some profit.
Why do I even bother replying, I can't understand a single word from your 'English' in that comment.
No. I actually do know why I am replying, I want justice, and you being marked as a scammer.

Wait, how is this a wrong format?
I have Victim.
Scammer.
And a screenshot.