I am going through mediation right now. I am a father of two children to which I have full legal and physical custody. My children's mother has supervised visits due to many reasons including false accusations and drug use. I filed an "order to show cause" because she had violated the original order by having nonsupervised visits (which she admitted to one, kids stated that there are more) as well as nonpayment of child support. She is asking for unsupervised visits. During mediation she has purjured herself numerous times which I have recorded voice mails and legal documented proof of her lies. She had told my son that he does not have to take his ADHD medicine because she doesn't believe he has it ( which he then argued with me about taking his pills ). She has introduced the children to 3 guys in the last 6 months as their step father and is now pregnant. My children were questioned by the mediator and children stated they want to see more of their mom. I am worried about my children's welfare due to the prior abuse she has inflicted on them and the progress my children and I have accomplished through therapy. I am seeking a lawyer but no one calls back. What should I do?

These are not atypical problems.
Children are listened to, but what they want isn't the deciding factor.
Lying is almost a given, and courts don't want to hear the word. Just try to prove what you know to be true.
If you don't think you have a good mediator, and there was something about the last meeting that leads you to believe that your ex may win, then you need that lawyer.
Hearing a few sentences about what she does doesn't help here much, if you are looking for probabilities.

When you call family law lawyers, are you saying you can pay? Can you pay? Are you near any law schools? Are there self help groups like Parents without Partners near you?
What state do you live in?

How old are the children? Do they have a GAL (Guardian ad Liteum)?

Do not accuse the mother of perjury, but if she makes statements in court, you can use your evidence (providing it is legal) to counter those statements.

How is it that the mediator got to talk to the children? A mediator has no business talking to your children. Mediation is between you and her. What the mediator did was cross the line.

In regards to the answers given. I have not accused her of perjury. During the mediation she has been very dishonest and is trying to control the room by attacking my character and making false accusations toward me. The last meeting she had accused me of being "high on drugs" during the mediation. The mediator asked me if I was and I voluntarily scheduled an immediate drug test and tested negative for all drugs. Everything she says I have documented proof stating otherwise. I am deeply involved in my children's life. I volunteer daily at their school. I have a very structured house ( rules, chores, eating schedule ), also I am very consistent in their life. I feel as if I am being judged when I have done no wrong. I am seeking help through a law school here in California.