My friend

Why is there only one church? The simple answer is because God tells us in his word there is only one church or body Ephesians 4:4. The first thing is establish who is the head of the church, and who established the church? We only have God`s word as evidence. Jesus said he would build his church Matthew 16:18 1 Corinthians 10:32. That`s exactly what occurred on the day of Pentecost. 3000 thousand were saved by God, because they obey him (the gospel). Baptized into Jesus Christ, putting on Christ Romans 6:1-7   Galatians 3:26-27 In Christ.

In Colossians 1:18 we see Jesus is the head of the body, which is the church. Again in  Colossians 1:24.

 Have you seen in the scriptures another name of the church other than church of Christ, or church of God. No why? Because there is only one church established by God almighty. Established, bought,and paid for by Jesus Christ`s death, burial, and resurrection. Church of Christ is the church I`m a member of. The Lord himself added me to his church Acts 2:47. Romans 16:16, Ephesians 3:14-15,21

Ephesians 4:4.

 If you are a member of a assembly with a different name, other than church of Christ, church of God. You may not been added to the Lord`s church. In addition you are practicing, and contradicting

the word of God.       1 Corinthians 1:10  Worshipping in vain Matthew 15:7-9 . Names identify, who we are. Just be a Christian.  Acts 11:26  Colossians 3:17 Philippians 2:9-11.