Declined 76561197960896000 (Pretty)

Victim:
| steamname: AcT.Rendox
| steamID32: STEAM_0:1:58640490
| steamID64: http://steamcommunity.com/profiles/76561198077546709
| customURL:
| steamrep: http://steamrep.com/profiles/76561198077546709
Scammer:
| steamname: Pretty
| steamID32: STEAM_0:0:315136
| steamID64: http://steamcommunity.com/profiles/76561197960896000
| customURL:
| steamrep: http://steamrep.com/profiles/76561197960896000



Okay so this guy adds me on steam and writes me about my baby roshan courier(dota2).Aventually we agreed to trade the item and he requests a trade and i accepted it.I havent really done this before the guy was so obsessed with the item that he offered me a payment of 25 euros.I have never done this before and i surtenly had a long though about it and eventually i agreed.
So he sends a steam guard trade not a normal chat trade and at first i didnt knew what it was or how was the trade going to finish nor how was i going to get the money.In a lower braket it said that his 25 euros would be deposited to my steam wallet and i accepted the trade and next ting you know my steam wallet didn't moved from the previous 0.36 euros sum and i lost my baby roshan.
After the trade he instantly removed me and i am almost 100% surtan that he has blocked all communications with me and therefore there is no way i can contact him.

Please help

Hello, could you provide:
1.) Proof of the original agreement, such as screenshots of the chat or a screenshot of him giving you the fake message
2.) An uncropped screenshot of your trade history showing the items traded

Remember to upload them via the Upload a File button near the bottom.