Hii there
I'm working as cordova/phonegap mobile application from last 1.5 years and have experience in working on Php, Ionic framework, AngularJS, JQuery, JavaScript, Cordova/PhoneGap, Html5 and Css3.
As I understand from details you have provided, Your app may have issues with facebook sdk installation. Since Cordova Facebook Sdk have two different version for android and for Ios. But It may also have some other issue and I can debug and fix it.
Looking forward to work with you.