Can she ask for a court date sooner and move forward because he refuses to sign anything?

My girlfriend has been separated for 3 years and has placed her divorce paperwork in about a year and a half ago. Her ex refused to sign paperwork after case went into default. Girlfriend had to file paperwork and judge advised her ex to sign paperwork however once paperwork was filed; her ex didn't file anything nor signed anything. Per stipulated request on divorce paperwork, my girlfriend asked for child support and amount was given by court. He had paid child support for about 2 months then stopped and hasn't paid anything for the last nine months. My girlfriend has contacted child support office and they forwarded the case to the DA. She was told to wait for a court date (about a year ago when case went into default) and she hasn't heard anything yet. Recently, she received an unexpected fine from a vehicle (with her ex and her name on registration) that her ex had and HE had accrued street sweeping tickets that ultimately she ended up paying for. Initially when the paperwork went into default, my girlfriend stipulated on it as well that she would keep paying for a Tahoe (Contracted by HSBC) she had and he would pay for a car that their college son was using. Both vehicles still registered to both. He paid on car for a good 5 months then car was unexpectedly repossessed because he stopped paying for 4 months. We paid to get vehicle out and continued to make payments on car. She wants to be done with him and wants to have divorce finalized but he is just being a butt head and postponing it as long as possible (on purpose, because he stated he would make her life hard)