You also know that Matthew 18:16 sets forth the action to be taken next: you must go to see him, taking one or two others with you. But this plan must be implemented by (1) deciding whom you should take and enlisting their help, (2) prayerfully setting a time and place for the three of you to make the visit, and (3) deciding which one of you will ask to make the appointment and lead the discussion (not everyone can do this).