Pray for God's guidance, wisdom and discernment. If what you believe is in fact true, than you may have to be the one to shed light on the lies and deception. The Book of Esther may have your answer.

Esther 4:14

14 For if you remain silent at this time, relief and deliverance for the Jews will arise from another place, but you and your father’s family will perish. And who knows but that you have come to your royal position for such a time as this?”