The attack happened at his workplace, which is a church that I attend. There was no credible witness. I did not call the police as there was no visible bruise on the day of the attack, but I reported the incident to the pastor. The pastor does not want to get involved. My ex-boyfriend denied the attack and was emotionally unstable knowing that I had reported the incident. He now threats me with a lawyer's letter, saying that I was harassing him and that I must avoid any contact with him, personally and professionally. I never harassed him. If anything, he was the one who was harassing me both at his workplace and at private conversations. I would like to know what I should do at this point.