Having answered the OP, I am going to continue and do so by the example I have used.
Once both sides have been heard by those in authority and the issue has been adjudicated, what is the proper response?
As Christians the proper response is to accept reproof and correction for our own behavior, repent, and forgive the behavior of those who have acted against us.
But what if one party rejects reproof?
That is what happened in my example. The man who falsely accused me, who I insulted, rejected reproof each time it was given.
While this is sinful behavior, we risk the danger of getting caught in a loop. The man will not accept reproof or responsibility for his actions. But if confronted with this sin he would seek to paint himself in a positive light rather than take responsibility for his conduct and the whole thing would start anew….that is, if he could drag others into the fray.
In other words, rather than facing his own sin, that man has continued to try to point to my sin which has already been adjudicated by men, confessed by me, repented of, apologized for, and forgiven by God; and this in an attempt to justify his conduct as he rejects reproof and correction.
Where do I stand?
I started out expressing hate to this man, then ambivalence. He wants to be my enemy, that is his desire and the reason, I believe, that he has set himself against me. I do not even know the reason he has (or think he has) to treat me that way. But I am not called to express hatred towards him. I am not called to be ambivalent. I am called to care, and to love him.
He may be my enemy but that is his choice. I am not his enemy because that is my choice.
I have chosen to forgive him because God has forgiven me. God has forgiven me because I have forgiven him. I have chosen to love him because God loves me. I know God loves me because I love this men who has set himself as an enemy and accuser.
How do I choose to handle the issue?
I leave his repentance to God as this issue is truly between him and God. I am no longer in the equation. I left the issue when I forgave him, apologized, and was forgiven. I am no longer a party. The two parties involved are the man and God.
But I can engage with Scripture. I can continue to let him know that I have forgiven him. And I can continue to let him know that, although we may never get along well, I do love him and I wish the best for him.
And I will continue, for his benefit, to post about the poison of unforgiveness and how it leads to death.
If he were reading this I would offer him Matthew 6:16 and tell him that if he does not forgive then the Father will not forgive him; and Hebrews 12:15 that he is disobedient with this bitterness and trouble making; and Colossians 3:13 that this is not a choice but a command; and Matthew 18 that if he does not find himself able to change he will not inherit the kingdom of God.
I would tell him that he needs to develop a fear of God that exceeds his hatred of other men.
More importantly, though, I would tell him that I love him and am praying for him.
I hope he stumbles across this thread and reads these posts. And I hope God uses it to call him back into the Light, back into fellowship with God, and back into obedience.