Facebook Contact Sycn Problem

[AC Question]

The contacts of Facebook are not sycning with my phone contacts. Earlier when I bought the phone in April 2015 it was working. By November the option of syncing was still there in account setting but no longer in the app. And now there's no such option. I tried several 3rd party apps like Sycn.me, Uber Sycn, Hax Sycn etc, but no use everyone of them has a problem either we need all our friend to have access to the app or the app couldn't match the phone contacts with Facebook.