Today, I received a scam message saying that there was evidence of my cheating.

First, make sure he knows your general information. If he doesn't even know your name, how can he know that you are cheating? If there is evidence, show it. Your body is not afraid of shadows. If you are really cheating, it may be that the other party is trying to cheat you. Remember that you know people, but you don't know your heart. . . . .