Matthew 18:16 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.’
“But what if they don’t listen to me?”
There is still no reason to make things public by passing your own judgement over someone else who is doing things wrong – take along someone else you trust and confront them in person again.
Going around telling other people what you think someone is doing wrong is going to do nothing but make people angry and achieve nothing!
Be patient and do it according to God’s Word!