My Sister's Ex Called Us Non-Standardly

My sister's ex showed up at our house and tried to get in. He got no answers as I refused to get off the computer. When he couldn't get in through the front door he tried other ways which was weird considering that it was broad daylight. No neighbor called the police other than my father. Days later we got the restraining order which of course her ex violated by calling us non-stop thinking we only had the voice message machine connected to one phone. It was sent to a mental health facility after that. Some guys just don't take rejection.