Where can I go to get legal assistance? The other party has legal assistance from Community Legal Services in Philadelphia, Pennsylvania.

Good afternoon. I am going through a difficult child custody and child support matter. My children's mother passed away in 2013 and the maternal grandmother filed for child support in 2013. I am currently paying child support currently. I understand my financial responsibilities but I am having difficulties getting legal assistance. At this point-I feel that I can never gain sole custody of my two children. I want the maternal grandmother involved in their lives but my children only see me two Saturdays a month and one of my children has an intellectual disability and I can not be consistent in my children's lives if i am not getting any cooperation from the maternal grandmother.