When I've filed a dispute with Paypal and requested a refund, Paypal asked that I supply a tracking number. (Always include insurance too and add signature confirmation as well.) Paypal tracks the package. Once it arrives, you'll get a refund shortly thereafter. I'm not sure how long after, BUT it will come. I can't remember if the original seller must contact Paypal as well to confirm if it was received, but nonetheless.
OKs. its just paypal have not replied to the case yet. Just the seller sent me msg that he will refund me after I opened the case.