blade knife Scammed me.

I figured he had vouches, and posts, he was trusted.
WRONG
I sent him a MSP Code (4k) And he said it didn't work because he lived in the UK, but that XBL was global. I figured, sounds fair enough.
So I sent him the XBL 12 month code. He then said it didnt work. I knew at once he was scamming, so I asked POH to try and redeem the code on his acc. What do you know? It says "Already redeemed." He then tried to lie to me and say its region locked.
Pics:
http://img534.imageshack.us/i/proof1i.jpg/
http://img156.imageshack.us/i/proof2w.jpg/
http://img689.imageshack.us/i/proof3g.jpg/
http://img171.imageshack.us/i/proof4c.jpg/