Divorce on the grounds of cheating

Hello, I ve been cheated by my husband n his family, in matter of his education, salary, job profile, property. And parent-in-laws always mentally troture me for extra dowryinform of a/c, gold.and uses abuivse words to me n my family. My hubby was good to me until I ve been through etopic pregencny, I lost my baby from that time they started blaming me that I can't bare a child. I have consultant drs. They said I will convince. Imthey changed my hubby, now he act on behest of his elder brother. Now they are planing to perfrom second marriage of my hubby. They are asking for divorce in court, even my advocate is forcing me to give divorce. But I want to save my marriage. I have little hope my hubby will change. Could you please help me what to do to save my marriage. Thank uou