Someone on YouTube is accusing me of harassment and threatened to call the police on me! help??

I didn't do anything. Someone falsely accused me of harassment and bullying and they said their cousin is on the phone with the police. This person told me to tell the truth and I told them I didn't do anything. Do you think the law enforcement and youtube will do anything about it? I'm afraid that when I get back from my trip to England, I'm going to get arrested for something I didn't do. They're trying to track me down and I'm so scared! I had to delete my account. They said they found my other channel which I haven't used since 2014. I'm scared to death!!!! 😨😨😨😨😨😬😬😬😬