Swiggy — Order issue (The quantity of food is not adequate) for order #[protected]

In the order i had ordered there is written 6 pieces in each of the pizza but in the order i recieved there is only 4 pieces in each of the pizza.

Which means clearly about 30% less quantity in each of the pizza and i this is huge. So I must get 30% of my order value back.

This has not happened with me for first time, this is second time i recieved less quantity of food .
Restraurant is making people fool!