Child custody

I have married 3 years before and having a child 1.5 years old. We both were working and we both of us being in Bangalore separately . My Husband's family has too much of debts and they are feeling in security that if his son will start to take care of me & kid they won't be getting anything, so MIL creating so much issues in family. My husband haven't spend even a single rupee from us till now whereas he pays his most of the salary in paying EMI which was got for MIL. I have spend my complete earnings in day to day expenses and recently they have forced me take loan for 2.5 lakhs for paying some debts. Additionally i have paid 5,000 PM to MIL for some chits for few months then they made me to pay vehicle loan and now this personal loan. MIL was in too much of money crunch and because of all these issues he became drunkard which creates so many issues in personal life. I went with my parents to MIL home to discuss about all these issues to find out a solution but she created a very big issue and shouted on everyone in disrespectful manner and spoken in third rated language and criticized my characters badly threatens that she will takeaway my KID from me. My husband will not understand my MIL character and support her in everything. My husband got scared when i told that i will file a compliant against both of them and after that he was behaving like a good person for these two days. I don't know when they will start this issues again. MIL took my jewels and she pledged the same without informing me and he says i will get it back but nothing happened till now. After marriage i lost everything and everyday she creates some fights and creates mental torture. He fights with me and couldn't find a solution and being drunkard I'm worrying about my kids future. Kindly advise me what i can do. Can i file a compliant if things goes worse?