And now you will wait 20 days for his non response to the chargeback and only then Paypal will look at it and probably, probably, give you your money back.

Congratulations, you just managed to get your funds on a limbo for at least 1 month

EDIT: That was fast. Escalate to Paypal resolution right away. Or else you're doomed.
Be sure to mention bitcoins to paypal. <--- This could get your account frozen also, be advised