delivery boy behaand swiggy worst customer service

I have ordered a food yesterday from the swiggy outlet but the delivery boy took 20 minutes to hand over the parcel to me, even after reaching at my place. when i opened it, i saw the packet has already been opened and tasted from the corner. i asked the delivery executive to take it back, as i want to replace but he refused. later i mailed many times, uploaded pictures for proof but no response i get. even i did not get my refund also.