Delhivery — Received completely damaged product

I placed a order to deliver my product from Jaipur to Jodhpur(same state), I received completely damaged product. I raised so many complaints on delivery customer care portal, tried e-mailing them several times but they are not replying to any of them. My package was fully insured by delhivery but now are they are not taking any action. I want refund of my product as soon as possible.