simple task, Solve 2 issues in unity3d 8 pool ball game code

I bought the code for 8 ball pool game, i setup the code by my self with the help of documentation but i am facing some issue in fb sdk login and in app purchase function, let me know if somebody can solve the issue using anydesk, Note:- i can not share the code. there are 2 ad network integrated in the code, admob and unity, i only want unity ads and remove google admob, i need unity banner and interstitial instead of admob.