Go First Airline — Customer Care

I travelled by Go First from Chandigarh to Mumbai on 5th Aug 2022. I had taked an insurance for flight delay for more than 1 hour by paying additional premium. The flight was delayed by 1:30 hours and I'm eligible for the compensation. The insurance co Acko insists for a confirmation in writing by the airlines. I raised request, send reminders and also called multiple times. They are not providing the confirmation.