Diablo3Zealot just scammed me??

I think I just got scammed by Diablo3Zealot. Gave him the key first since he had higher reputation, then he tells me the key is invalid, then he shows me his screen with one error message. After sharing his screen with me again, it shows another error. After I tried to keep working with him, he just signed off...what can I do now? This was my first trade...

[7:20:16 PM] Astantine: Astantine has shared contact details with Diablo3Zealot.
[7:20:31 PM] Diablo3Zealot: You manage to find one yet?
[7:20:33 PM] Astantine: sup man
[7:21:16 PM] Astantine: nah most mods are pretty busy i guess. i'll just go ahead and go for the trade. how are we doing this?
[7:21:27 PM] Diablo3Zealot: what is your paypal email?
[7:22:09 PM] Astantine: [edited out], verified
[7:22:16 PM] Diablo3Zealot: alright cool
[7:22:19 PM] Diablo3Zealot: just a second
[7:22:27 PM] Astantine: so i guess i give the key first? what is your email?
[7:22:32 PM] Diablo3Zealot: alrighty
[7:22:45 PM] Diablo3Zealot: the email is [email protected]
[7:22:47 PM] Diablo3Zealot: you gonna send it to email?
[7:23:02 PM] Diablo3Zealot: just copy + paste it onto the chat
[7:23:10 PM] Diablo3Zealot: i'm sending the money as a gift, by the way
[7:23:19 PM] Astantine: sounds good, here's the key
[7:23:24 PM] Astantine: [edited out]
[7:23:29 PM] Diablo3Zealot: alright cool
[7:23:33 PM] Diablo3Zealot: just a second
[7:24:27 PM] Diablo3Zealot: says it is not valid
[7:24:36 PM] Astantine: dude are you serious...
[7:25:07 PM] Astantine: this is a clean key from blizzard man. received today. please don't mess with me
[7:25:14 PM] Diablo3Zealot: i'm completely serious
[7:25:18 PM] Diablo3Zealot: want to see for yourself?
[7:25:32 PM] *** Call from Diablo3Zealot ***
[7:25:55 PM] Astantine: i mean there is no real way for you to prove that it's invalid man...
[7:26:34 PM] *** Call ended, duration 01:03 ***
[7:26:38 PM] Diablo3Zealot: See?
[7:26:45 PM] Astantine: oh hmmm, so it doesn't say not in use
[7:26:58 PM] Astantine: let me double check i couple pasted it correctly
[7:27:35 PM] Astantine: hm i mean either way i shouldn't have to fear since the key was sent to me, i can just call up blizz to fix it. but one sec
[7:27:46 PM] Diablo3Zealot: You know what
[7:27:52 PM] Diablo3Zealot: just
[7:27:58 PM] Diablo3Zealot: i don't know if i can trust you man
[7:28:07 PM] Diablo3Zealot: i'm having second thoughts, sorry :/
[7:28:20 PM] Astantine: uhhh...because?
[7:28:35 PM] Diablo3Zealot: the first code didn't work?
[7:28:51 PM] Diablo3Zealot: i'm not
[7:28:55 PM] Diablo3Zealot: calling you anything
[7:28:59 PM] Astantine: i mean dude, i literally copy pasted it from the email
[7:29:02 PM] Diablo3Zealot: but this is usually how scams start to go
[7:29:11 PM] Astantine: i don't see how i could scam you if i'm going first...
[7:29:27 PM] Diablo3Zealot: look
[7:29:28 PM] Diablo3Zealot: just...
[7:29:35 PM] Diablo3Zealot: you'll get better offers on the forums
[7:29:47 PM] Astantine: dude i just gave you the key...
[7:29:55 PM] Diablo3Zealot: and it didn't work
[7:30:18 PM] Diablo3Zealot: you gave me a nonfunctioning key
[7:30:26 PM] Diablo3Zealot: you're lucky i'm just going to leave this alone
[7:30:38 PM] Astantine: i don't see how that is possible man, i received the email this morning from blizzard
[7:30:44 PM] Astantine: can you show me one more time
[7:30:46 PM] Astantine: through skype?
[7:30:55 PM] Diablo3Zealot: fine.
[7:30:56 PM] Astantine: [edited out]
[7:31:02 PM] *** Call from Diablo3Zealot ***
[7:31:41 PM] Diablo3Zealot: Now what the hell is that??
[7:31:54 PM] *** Call ended, duration 00:53 ***
[7:32:11 PM] Astantine: dude i honestly have no idea man...this is why i said i prefer to do it with middle mens...because now there's no proof of anything
[7:32:58 PM] Astantine: can you try it
[7:33:01 PM] Astantine: from the add games page
[7:33:07 PM] Diablo3Zealot: fine
[7:33:36 PM] Astantine: these are the steps i got in the email
[7:33:37 PM] Astantine: Getting Started
1. Log in to Battle.net.
2. Click the "Account" button.
3. Create your BattleTag: Click "Create One Now" under BattleTag in the Account Details section.
4. Click the "Add a Game" button.
5. Enter your Diablo III beta key and click the "Activate Game" button.
6. Verify your age.
7. Select Windows or Mac as your operating system to download the beta client.
8. Select "Run" when the installation .exe pop-up box appears.

And now I think he just blocked me because he didn't respond and now it says "this person has not shared their details with you"..He just went offline too. WTF is this.

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Edit: Trying to contact Blizzard now to resolve this issue, but any help would be appreciated!

 

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