What can I do if my husband is calling at my office and defaming me

Married 8yrs 1kid girl 7yrs, lived in chennai but during last July 2017 he applied divorce at his native tirunelveli . Now I applied transfer op to chennai under process. Meanwhile he is torturing me by sending so many official unwanted mail to my higher official, keep on calling all my heads mobile number and speaking abusive language saying she is theft y r u keeping still on her job. Remove from job. He is challenging me through WAY2SMS online that he will make me jobless. And helpless. Now daily basis he is calling from different lines and irritating to make myself jobless. My kid is with me. Am with my aged parents. Am the only bread winner of the family. I given compliant in commissioner office when they called him. he is refusing to come for enquiries stating that he applied divorce he will see everything in court. Pls help me what to do now.