Bring my kids home

In August 2016 when Gavin was only 2 years old and Gweneth was 8months their father who I thought loved me hit me 3 times in my leg in front of Gavin. He apologized to me the very next day and I tried to forgive him but I looked at my black and blue leg then I looked at Gweneth and I thought to myself that she can not think this is ok. I looked at my son Gavin and thought to myself is that the way I want my son to be raised? I knew immediately if I didn't  act fast then it would happen again, I knew if we went our separate ways then he would still control me so I went to the police. Their father was arrested immediately but only to be released 12hours later. He did not want to help with the kids at all so I went to seek custody and child support. I was awarded 100% sole/physical custody but I told the judge the kids needed to continue their relationship with their father so him and I agreed on one night every other week. This worked out well but I thought the kids needed to be with him a little more, so about a year and a half later I suggested he get the kids for two nights every other week.  I continued his relationship with the kids. Well in October 2018 I was terminated from my job which included housing so I began to look for other employment out of state. In December 2019 I was offered a job and housing in Portland, Or. I did not know that me being the custodial parent I had the presumptive right to move so I filed for an ex parte hearing for a move away request which was granted. We went to court and the Commisioner denied my move away and granted my ex temporary physical custody because she assumes I would not continue the kids relationship with their father when I have been the one to put the effort.  Well in CA if you have a domestic violence charge against you then you are to not get custody unless you complete some things and the judge stated he did but he didn't as he has been in violation of his restraining order multiple times.  Also in CA the non-custodial parent is to prove why a move would be detrimental to the children involved and the commisioner did not make my ex do this. 

My kids are begging me daily to bring them home. I can tell they are not happy and they miss being with me. My ex is using them to control every situation he can. I am trying to get the funds together to file a writ as the judge did not apply the law correctly. She is stating that my original orders were only temporary which is why she ruled the way she did. My orders may have only been temporary but that is because I didn't file the findings and order after hearing in 2016. 

Please help me bring my kids home. No kids this young should be without either of their parents but mostly without their parent that has had over 90% custody for over 2 years.