Get twenty phone numbers. Whenever you meet someone you know, tell them you changed your number because of this stalker and to give you their phone so you can give them the new number. Give them a different number every time, until you reach twenty. Make a note of who got each number. Wait a week. If you weren’t contacted yet, do the same thing with 20 other people.

When you ARE contacted again, you’ll at least have a list of people who knew the number, if not the exact person. Then you put on a hoodie in a color you don’t usually wear, take a baseball bat to their head from behind, get rid of hoodie and baseball bat in a dumpster on the other side of town and enjoy the rest of your life.