As Mr. Levy stated it is a criminal matter and you can file a police report. It is also a invasion of your privacy and if he is letting viewers assume you are available for sex for money, it is defamation. You have the grounds for a civil suit for defamation and invasion of privacy. Make sure to download these so you will have proof in case they "disappear" from the web.You might find my legal guide on selecting and hiring a lawyer helpful.
You might find my legal guide on Is it Legal? Is it Illegal? helpful.
You might find my legal guide on the understanding the different court systems helpful.
You might find my legal guide on legal terms used in litigation helpful
(Even if you are not filing a lawsuit this information can be useful).
Mr. Sarno is licensed to practice law in NJ and NY. His response here is not legal advice and does not create an attorney/ client relationship. The response is in the form of legal education and is intended to provide general information about the matter in question. Many times the questioner may leave out details which would make the reply unsuitable. Mr. Sarno strongly advises the questioner to confer with an attorney in their own state to acquire more information about this issue.
The cops are wrong and likely just do not know what to do and cannot be bothered trying to find out. The pictures may belong to your ex but posting them with your phone number is stalking. Try speaking with a local agency that handles domestic violence and/or stalking issues for some ideas.