What legal recourse do I have with the Department of Children and Family Services in California (Los Angeles County)?

Hello, On May 20, 2008, my three grandchildren were taken away from me for failing to protect them as well as neglect. A man who used to be my boyfriend along with his family theatened to murder my children and grandchildren if I left. I did try to leave and even sought out the assistance of the Pomona Police Department, and the Santa Monica Police Department. I was told to get a restraining order. I couldn't get a permanent restraining order because the judge said I needed an address for the all parties involved--otherwise he couldn't grant it. My ex-boyfriend and his family planned on holding my ex-husband at gunpoint to rob him in the home. The ex-boyfriend tried to get me to draw a diagram of my home. I told him no and was severely punished. I don't know what to do.