Package ****** at Post office

On the 13 January I went to collect a package from Southgate post office.On my way home I felt the package was a bit too light.When I opened it, I was shocked to find out there was nothing in the pack but just an empty box.I immediately turn around back to the post (which was about to close) spoke to the post master who told me to come back the next day.I went very early the next where I was requested to complete a claim and was informed by the postmaster that the forms will be faxed to Witspos who will investigate.To date I have had no solution yet. Is there no other way to claim