I just put in a claim with Paypal on the 2 miners I bought from Asic Technologies. The resolution center went straight to filing a dispute and bypassed the regular communication phase. It's possible that Paypal has been dealing with multiple claims against this company. Absolutely no communication from them whatsoever, and their phone has been disconnected for 3 and a half weeks.
I hope you get your money back. Paypal tends to side more with buyers than they do with sellers, pretty sure there are quite a few people in the same situation.