New India Assurance — car policy termination and refund

Dear Sir/Madam,
I bought a car insurance from New India Assurance in policy bazaar website. I bought the policy for the used car which has lot of complaints and I returned the car to same owner within one day. Hardly I owned this car for only one day. I bought this police on the same day. After a month I remember this policy and dropped a email to New India Assurance Company for policy termination and refund. I was asked to send the new policy to terminate my existing policy but I wrote back my situation. then they asked me the RC copy of the car to terminate the policy. So I sent the RC as they mentioned but later they never progressed my request for the same and they are not even responding to my emails after that. please support me to terminate this policy and refund from the company. please find the invoice copy attached.

Policy Number :[protected]
date of purchase : 03/05/2019
Amount : 9310.00 INR
Termination requested date : 13/06/2019