Would it be the best way to legally get this person to leave me alone?

First, this so you have more understanding. She is my ex's (oldest son's father) girlfriend. He has no rights lost them last year. I have had a woman call child services on me 2 times. Allegations found to be false. She has now made allegations towards my job trying to get me fired. Also found to be false. She will not leave me alone. What should I do or can I do?