help someone scammed me!!!!! (trading)?

[David Borkowski]

i met someone online that said that they would trade a poster for three posters two albums and a shirt.
He said he doesn't send the first so I sent him the package. he received it and he blocked me from Facebook and never sent anything... I got many people on Facebook and a lot of famous people that are contact him to give it back. I'm still worried I gave him till Friday to return it what should I do if I don't get it should Do. Do I call the cops? is there a way to get his phone number from his address help
i have his address....