Maruti Suzuki India — wagon r / car not yet repair 1 month passed

I had met accident on 22.10.2017 and car was given for repair on 23.10.2017.
I have insurance from royal sundaram.
(Zero dept policy).
The car is with malad service centre, mumbai, kanchpada.

Whenever i asked about my car repair they tell that parts is not available.

Please look into matter and do the needful.

Car details

Name : nixon dsouza
Car no.: mh48 ak 6454