Finger licking short chicken

Ordered a meal consisting of 6 pieces, 1 large chips, 3 mash and gravy and 2 snack burgers, but I got 5 pieces of chicken consisting of 3 side breasts, 1 centre breast and 1 wing, I went back to the store immediately and instead of correcting their wrong, the changed the chicken pieces and gave me 3 drumsticks instead of 4 pieces of chicken and the rest of the other stuff. I'm so disappointed and angry about this.

They need to check the orders with customers to avoid this ****