Child access and custody

My husband has filed for divorce in 2018 in the name of some unknown photos mentioning i was into relationship with multiple guys or particular guy and now my 11yr old son has turned against to me as am his mother not even calling mom nor talking with me even after an order been passed for video call access my mother in law tutoring him but still my son tells me if he comes in call that i myself is telling no one is tutoring now am a big boy i dont want to be with you as you have ran away with other guy. my mother - in- law and my husband has enetrtained that particular unknown person via messenger and facebook and all the photos were circulated through out his company and relatives where now every is mistaken me believing really i have gone with other guy no one is ready to listen my side and now my husband is not sending me a single penny , no place to reside , currently residing with father but not permanent , my husband ignoring me but iam not interested in divorce i have applied for RCR, Maintenance and child custody now my lawyer also not working properly in my case from past 2yrs am not getting maintenance so am looking for legal aid as am not affordable to pay advocate in this current situation so plz help me to get back my husband and my child and my mother-in-law should be punished , she is not allowing to see my son 11yr old nor giving a chance to talk with him even directly whenever i go to my matriomonial house she makes my son sit in the bedroom telling him dont come out till ur mom goes and he also listens to her words also if i go she dont open the door at all or opens and closes harshly. she has given me enough mental depression saying what did ur father do for u . am only the daughter for my dad and i lost my mom at the age of 11yr old when i was doing my 5th std and i was not getting any support or care as i was dependentable , now my financial status is very weak so plz if any lawyeres can help me in my case as am earning only 7000 currently which is not at all affordable to pay advocate fees so please i request if any lawyers can help me out without any payment to get my maintenance , my son and my husband . kindly please suggest me the right way.