Those who constantly preach one thing but do another are those not to trust. Leave them alone.
Read: TITUS 1:15-16 below.
15 To the pure, all things are pure, but to those who are corrupted and do not believe, nothing is pure. In fact, both their minds and consciences are corrupted. 16 They claim to know God, but by their actions they deny him. They are detestable, disobedient and unfit for doing anything good.