Maruti Suzuki India — Fraud

Address:

New Delhi, Delhi, 110088

Above mentioned vehicle was purchased from maruti authorised dealer T.R Sawhney Motors Pvt Ltd ( Lajpat nagar ) on 16/11/2015.
I also buy 4th year extended warranty and also done return to invoice insurance of my car with maruti insurance due to good faith in maruti.
My IDV value was shown in insurance cover note was- 6, 60, 000/-.
As my vehicle was theft and i want to settle down my claim the insurance company was not coorporate with me.
They say that invoice value was lower than your IDV value and we settle your claim at 95percent of invoice value.
They also said that talk to maruti company fir this.

Kindly help me out and give me the favorable answer.
I would be very thankfull to you.