Paternal abandonment a social issue that women are guilty of

Hello my name is Ariana and I am joining you to tell my story which is no different from other single mothers, and also hoping to find help and comfort.
You see I got pregnant in the least pleasant moment in a relationship (when it ended), when I found out my first thought was to abort since the father of my daughter was not the person I thought and had cheated on me, and I did not want to have contact with him again but I went to my appointment with the gynecologist and after seeing that tiny heart beating and a thousand turns in my head I decided to have her, I talked to him and he told me he was going to support me. 
His support came and went, he gave me money, he looked for me, then he said he was not going to give me money, that he was not going to be responsible for something he did not want, then he would give me money again and then he would show up and so on until the end of my pregnancy, when he told me he was not going to give me the amount we had agreed on for the delivery. He attached a message that said the following: As you wanted things to go the hard way I comment that my position is that I will not deny the paternity of the child so when she is born you invest in lawyers and paternity tests, when there is a court ruling then we will see what they force me to do.

I have been fighting with him for more than a year and I still have not been able to sue him because he is a lawyer and in Mexico there is a lot of corruption, most of the lawyers I have contacted tell me that he is not going to give me alimony and that there is nothing more that can be done. 
  I looked for his family to try to bring my daughter closer to them or seek help and it was a big mistake, her father told me that he could not do anything and that this happened to me for opening my legs, as well as her sister and brother in law.
I wish I could do more, and be able to help more women like me who suffer from lack of empathy in a society where there are only single mothers and not absent fathers.
I have been judged, violated and humiliated even by women around me for trying to demand something that is their moral duty and obligation.

I contacted a lawyer that was recommended to me but she charges me 3700 dollars and I do not have that amount to spend on lawyers, I feel so helpless that he gets away with it and that there is still so much inequality in terms of responsibility for the children, I have not found a single association that can help me in my country, I am desperate.