How can I divorce my wife if she is involved in adultery?

My wife is in adultery. I have audio calls and she accepted it in WhatsApp chat and said she will give mutual divorce later denied again said file a case but don't let anyone know about the affair then i will sign again she denied and claims for maintenance now she is asking for money which her parents gave us at the time of marriage.. m in depression. I lost my job. The girl is in contact with her bf again after the divorce petition filed by me and happily doing her job.. what should I do soo that she can't get any money.. her parents are also a fraud they didn't told us about her education, her job and her earlier engagement... Whole family is fraud. Help me.