You repent by showing some humility....by submission and obedience to the ones who take the lead. (Heb 13:17)
A person who has doubts can approach the elders in the proper manner and receiving scriptural counsel.
Those who want to run away with their own ideas as if the slave is somehow tardy about dispensing the truth and needs their personal assistance, should understand that "food" is dispensed "at the proper time" and by the hand of the appointed slave.
Jesus is directing his congregation and they show that they are his willing disciples by their words and actions among a global brotherhood who are all unitedly preaching about the kingdom, just as he commanded.
If someone doesn't want to be a part of that brotherhood, they are free to leave...just don't expect us to treat it as anything but a defection.
Want you cake and eat it too? Cant be submissive?
Your problem.