My ex has posted to the "Public" audience on Facebook on four occasions derogatory and defaming information about me.

My ex has posted to the "Public" audience on Facebook on four occasions derogatory and defaming information about me. I have screen shots of all the posts made available to the "Public" audience. It is harmful, defamation of my character and has spread throughout my local LGBT community. She has been "monitoring" my Wall somehow and is what appears to be stalking my every move due to the details of her posts. I have reported the post to Facebook and haven''t heard anything back from them. I do not see a direct contact. Defamation of character could hurt my job and my reputation in the community. What should I do?