Defamation case

I am a woman working in government organization, one of my relative is fighting divorce case against his wife. His wife has confusion that i have affair with his husband. That lady file a RTI at my workplace for knowing my personal information like my parents address, my address, my mobile or land line number, my parent's mobile number. My organization rejected her application as it was for third party information. she again file a complaint in my office that i have married her husband, she use word characterless lady in her complaint. similar complaint she sent to police station. She has made my life miserable. What legal action i can take aginst her. what she is saying a complete lie.