tell me you paid with paypal. if you did, raise a report with paypal and hopefully you can recover your money. where was the item shipped from? 1 month is too long of a wait. Sorry to say this but I think you have been conned.

i would not know if your item is lost or not. But i dont understand the logic behind buying the ps4 from china. did seller mentioned estimated date of arrival? check with gdex. see what options you have on ebay to raise an complaint to get your refund back. if you paid with paypal you can raise a dispute and paypal will sort out the matter.