15 “If your brother or sister [ a ] sins, [ b ] go and point out their fault, just between the two of you. If they listen to you, you have won them over. 16 But if they will not listen, take one or two others along, so that ‘every matter may be established by the testimony of two or three witnesses.’ [ c ] 17 If they still refuse to listen, tell it to the church; and if they refuse to listen even to the church, treat them as you would a pagan or a tax collector.
I'm not sure what Listener's point is regarding the above. The scripture here states that any two Christians ought to be able to work out their differences. If they can't work something out, take the matter to the church and seek arbitration there. If your adversary refuses to listen even to the church, then you have some justification for not associating with him/her any further.
It does not mean pick up the phone and call the leading authorities of the church. That's why there are local authorities and general authorities. The idea is not to take the issue to an apostle or general leader of the church; rather, you take the matter to your local authorities (not the courts). If your adversary will not take their judgment to heart, then don't have anything to do with that person again. As Christians, we still are under obligation to forgive. "I, the Lord, will forgive whom I will forgive; but unto you it is required to forgive all men."
To call church headquarters and expect general leaders of the church to handle it is to bypass the chain of command that was established. Moses had to be taught delegation by Jethro. Likewise, the ancient leaders of the church ordained bishops and elders to handle such matters on a local level. I see no reason to believe it an admonition to take one's personal disputations all the way to the top.