I am sorry to hear that you are going through this problem with your ex. Contempt motions are usually filed by using the form requesting for a hearing on contempt. Look at California Judicial Council Forms FL-410 and FL-412. You will need to fill out both of these forms.
NOTE: Contempt is an area of the law that is a specialty, and even most family law attorneys don't have significant practice with the area. It is likely that your contempt motion might just be dismissed as well. It would be my advice to you to go into the motion with as much evidence and support that you can obtain. Not just text messages and family wizard reports, but also police reports and call logs.
Best of luck. If you need further assistance feel free to contact our office, we are always considerate of our clients financial situations and offer payment plans.