Look higher brother.
The seven churches are symbolic of all the Christian churches until the end of time, they are the target of the message of Revelation. John is reporting the message straight from the mouth of Jesus, the first chapter of Revelation explains that. Paul was a fellow worker with John but someone greater than Paul was sending this prophecy.
[Rev 1:10-18 KJV] 10 I was in the Spirit on the Lord's day, and heard behind me a great voice, as of a trumpet, 11 Saying, I am Alpha and Omega, the first and the last: and, What thou seest, write in a book, and send [it] unto the seven churches which are in Asia; unto Ephesus, and unto Smyrna, and unto Pergamos, and unto Thyatira, and unto Sardis, and unto Philadelphia, and unto Laodicea. 12 And I turned to see the voice that spake with me. And being turned, I saw seven golden candlesticks; 13 And in the midst of the seven candlesticks [one] like unto the Son of man, clothed with a garment down to the foot, and girt about the paps with a golden girdle. 14 His head and [his] hairs [were] white like wool, as white as snow; and his eyes [were] as a flame of fire; 15 And his feet like unto fine brass, as if they burned in a furnace; and his voice as the sound of many waters. 16 And he had in his right hand seven stars: and out of his mouth went a sharp twoedged sword: and his countenance [was] as the sun shineth in his strength. 17 And when I saw him, I fell at his feet as dead. And he laid his right hand upon me, saying unto me, Fear not; I am the first and the last: 18 I [am] he that liveth, and was dead; and, behold, I am alive for evermore, Amen; and have the keys of hell and of death.