Swiggy — Stale and uncooked food delivered and no proper compensation provided

I ordered 3 boxes of Barbecue in box with add ons. In two boxes the add-ons missing. And worst part is the biryani was stale and mutton uncooked.
How pathetic the restaurant is to deliver the stale food.
I ordered using #swiggy order no: #[protected]. On following up with swiggy a coupon of total 400rs was provided which includes 100rs worth missing add-on and 300rs for 3 boxes of stale biryani + 3 boxes o[censored]ncooked mutton. They think all these items were worth of 300rs only. Now I am following up with #swiggy for getting my money back.