Dynocopta is a scammer

I recently sold Dynocopta a copy of Arma 3 on steam for $40 via paypal and he is currently attempting to refund the money saying that it doesn't work after confirming via steam chat that he received a working copy of the game.

Our Steam Chat Log: http://i.imgur.com/gUCf9mD.png

The Paypal Dispute: http://i.imgur.com/tcdF5Lk.png

Proof that I did not block him from Steam: http://i.imgur.com/JRFTGOH.png

It is a screen shot of me typing this out with the imgur links to post that I could not possibly have before this message.

 

There's also this. Banned.