Paypal will not refund you unless you escalate the case so I would just hold tight for now. There may be a hold on that money now in the seller's account which may be frustrating to them but I doubt that there is anything that you can do about that until the phone is received.
One thing that you might want to check with paypal is how long they will keep the claim open without automatically closing it. I don't know if they have a timeline regarding that.
It would have been easier in the long run if you had communicated with the seller first before opening any sort of claim so keep that in mind the next time you have a problem. Sometimes the only option is opening a claim through ebay or paypal but that isn't necessarily the best thing to do.