if he will not hear them: tell the church. And if he will not hear the church, let him be to thee as the heathen and publican.(Matthew 18:17)
14 I write not these things to confound you; but I admonish you as my dearest children. 15 For if you have ten thousand instructors in Christ, yet not many fathers. For in Christ Jesus, by the gospel, I have begotten you. 16 Wherefore I beseech you, be ye followers of me, as I also am of Christ. 17 For this cause have I sent to you Timothy, who is my dearest son and faithful in the Lord; who will put you in mind of my ways, which are in Christ Jesus; as I teach every where in every church. 18 As if I would not come to you, so some are puffed up. 19 But I will come to you shortly, if the Lord will: and will know, not the speech of them that are puffed up, but the power. 20 For the kingdom of God is not in speech, but in power. 21 What will you? shall I come to you with a rod; or in charity, and in the spirit of meekness?
(1 Corinthians 4)
The church is any body of believers who gather to worship. It's not the Catholic church, annalex. It's not even the building.