Thank you for contacting Just Answer.
Answer: I switched your question over to "criminal law," but it could also be considered a "personal injury" type of question. It's not "consumer protection" because that is a law consumers use against businesses, for the most part.
What you are experiencing is a form of harassment. Depending on your local police or sheriff's office, they may be willing to have you file a police report (or sheriff's report) complaining of criminal harassment. It'll depend on some factors such as how busy the presecutor's (district attorney) office is where you live.
I doubt, however, that anyone will take this on as a criminal matter. That means that you may have to try to obtain a restraining order on your own, in civil court.
Would you like me to give you more information on what I'm talking about, or are you familiar with the court system?
Just to be helpful (I know you didn't ask) - I did a Google search on stopping junk mail (I need to do this myself!) and found many free services. I have not researched any of these, but here is a sample one that I found:
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