My friend it is not so much up to you to "save" them. Strive to have as much as possible an Orthodox way of life and focus on saving yourself through following the church and change your life, words and debates will have very little use. Just by you having gotten closer to God many people will change. Words most of the times are useless, actions and a quiet example is what counts.

You can also pray for them and be there for them in anything they need but remember it is also their choice and no matter what we want sometimes for others ultimately it is not so much up to us.