Scammed on Instagram: seller never sent item?

OK so I paid $150 for an iPhone to this guy on Instagram and its been two weeks and I haven't heard a word from him He's ran off with my money and he's blocked me on Kik and Instagram. Can I get the police or the FBI involved? Can't they trace his Kik and Instagram page to see who's behind it or something and get my money back?

I hope you paid by credit card or you may be out of luck

A fool and his money always part ways.
I have a blue iPhone 5c for sale, brand new 200 bucks
If you are interested email me at
IamRunningWithYourMoneyFool@YouWillNeve…