Swiggy — Missing items from my order

Address: New Delhi

I ordered food from a renowned restaurant via swiggy on 26th October at 9:42pm and received it at 10:21pm. My order was 2 varieties of paneer tikka roll with tawa gravy, 1 variety was full plate and the other one was half plate.
In full plate, the restaurant gives 4 rolls and in half plate, they give 2 rolls. So, in total 6 rolls I should have received. But I received only 4 rolls.
2 rolls were missing from my order, plus the bill was also missing. It was clearly visible that someone torn the bill from the package.
I spoke to swiggy customer care for over 1.5 hours but didn’t get any resolution for my issue, I asked them for a refund or replacement but they clearly denied and said that the mistake was not at their end, they cannot do anything in this matter.

Then I personally checked with the restaurant by, they said they did sent the complete order i.e 6 rolls with bill. And moreover restaurant’s never hand over any order to swiggy or any other delivery boy without bill.

But I neither received the complete order nor I received the bill.

Hence, it’s cleared that the mistake was at swiggy’s end. Their delivery boy’s end.

I should get a refund or compensation for the inconvenience they caused.