Insurance Regulatory and Development Authority of India (IRDAI) is an autonomous apex statutory body which regulates and develops the insurance industry in India. It was constituted by a Parliament of India act called Insurance Regulatory and Development Authority Act, 1999

As you wants to Make a Complaint to the IRDA you may Registered your Complaint by :

Approach the Grievance Redressed Officer of its branch or any other office that you deal with
Give your complaint in writing along with the necessary support documents
Take a written acknowledgement of your complaint with the date.

Approach the Grievance Redressal Cell of the Consumer Affairs Department of IRDA:
Call Toll Free Number 155255 (or) 1800 4254 732 or

you may send the Complaint Registration form on the below Address :
Consumer Affairs Department
Insurance Regulatory and Development Authority
3-5-817/818, United India Towers, 9th Floor
Hyderguda, Basheerbagh
Hyderabad – 500 029
Or Fax to
040-66789768

The Complaint Registration form is given in the below Attachments that is Free to Download

IRDA Complaint Registration form