Mental harrassment by in laws

Hi Me and my husband are married since 4 years and have a 10 months old child. We had a love marriage. After one year of my marriage my in-laws started torturing my husband for marrying by wish and tainted us for 30 laks dowry many times. They taunted for inter caste marriage, and keeps scolding him for years on every pretty thing. Also they never spoke to me and ignored me on calls as well as whenever we visited them. They kept demanding household items for them, for my BIL ankur also money at several times. After my delivery my MIL tortured me everyday and never let me rest. MIL and SIL wanted me to cook food immediately after my c section. My husband never liked them but always told me to ignore them. Now my SIL said to me bad words and blamed me for having attitude because I'm earning huge amount of money and MIL supported her. Husband's was mad at them but they didn't listen. Now i wish to take legal action against them, which my husband has no issues to. Since my mental health has deteriorated and I've too take care of my family, please guide me on this.