If My people who are called by My name will humble themselves, and pray and seek My face, and turn from their wicked ways, then I will hear from heaven, and will forgive their sin and heal their land. Now My eyes will be open and My ears attentive to prayer made in this place. 2 Chronicles 7:14-15
Even humans call their own by their name. House of Solomon, Wife of Solomon, Children of Solomon, etc. Therefore, It is but logical that the place where the people of God pray is called the Church of God.
Philippians 2:12 Therefore, my beloved, as you have always obeyed, not as in my presence only, but now much more in my absence, work out your own salvation with fear and trembling;
Preachers may pass away, but the doctrines and the teachings shall not pass away as what they saw and heard are written down. Therefore, it is the teachings that you should accept and have fellowship with at the House of God called the Church of God.