I bought an iPhone from facebook it got shipped to me i just turned it on and its locked to owner i cant get ahold of the person

Authorization lock cannot be turned off without assistance from the previous owner. See: Activation Lock for iPhone, iPad, and iPod touch - Apple Support

and How to remove Activation Lock - Apple Support

If you cannot get assistance from the previous owner, Facebook Purchase Protection may help: https://www.facebook.com/help/228307904608701

You have been scammed; that is a useless phone, probably a stolen phone.

See→The All Too Common SAD Reality of Buying a Used iPad/iPhone