Swiggy — item missing and money not refunded

Address:

Florencia Apartment, 411057

We paid whole amount of bill for 5 items wherein afterwards we noticed that one item was missing. Also, they aren't ready to refund the amount of one item missing. The delivery man immediately went away after delivering the order and when called, we aren't able to connect with him. The customer care is resolving the issue by giving us ₹25 discount on next order. Is this the real solution? We ordered because were hungry and tired due to which we will bare the loss.