B1ack_Falc0n got scam at 4/jun/2018

Hey Guys I just recently got scam and I lost two sets Undying (Forlorn descent) and Phantom Assassin (Visions of the lifted veil)
Yes they are from The International 2018 Collector's Cache.
The player which scam me is TLC No One(Ehtisham Ahmer on facebook).He was in my friend list almost 2 month.
TLC NO ONE Steam Profile Link "https://steamcommunity.com/profiles/76561198114321049/"

On 3-jun-2018 He(TLC NO ONE) text me that "I want Collector's Cache set and in return I will give you TI18 immortal."
(B1acK_Falc0n)So I reply that "I want Troll Warlord immortal."
(TLC NO ONE) Reply "ok i want 2 sets"
(B1acK_Falc0n) I reply "I will give you 2 Sets of Collector's Cache + Immortal + One more Set and in return you will give me Troll Warlord Immortal + Axe Pet (Almond the Frondillo)."
It take me almost hours to convince him that a fair trade.So in the end he(TLC NO ONE) texted "ok send me Set's)"
So I send him offer and gift him one set (I can't send him other set's because I already send 8 people gift so i have to wait 24 hours)
So texted him "I will send you other set tomorrow"
(TLC NO ONE) Reply "you are a scam."
(B1acK_Falc0n)I reply "just don't conform until you get other set's"
Next day I send him other set and text him accept trade.
(TLC NO ONE) Reply "ok wait"
after some minutes He(TLC NO ONE) reply "Bye" and Unfriend me(B1ack_Falc0n)
So Guys I am requesting that help me by reporting that scammer steam user.
I will be very thanks full
B1acK_Falc0n
You can see that he unfriend me a minutes after having both set's

And you can also see that he Didn't trade what he offer me