Since you refused delivery the package should now make its way back to the sender, as long as the sender put his address on it. Hopefully he did.
For the sender to put in a claim for loss he'll usually ideally need the actual packaging (in my experience[1]), although your pics will presumably help.
In scenarios like this (especially when dealing with non-commercial vendors) I think it is almost always better to accept delivery. That way the packaging material (i.e. the actual evidence needed for a claim) is in your possession.
It's now up to the vendor to refund you and separately make the claim against PF. PF may at some stage contact you to confirm information.
Footnote:
1: I've put in claims for loss on a few occasions but always to RM, not PF.