Shortage

I bought a family treat meal earlier this evening with 3 sides that were supposed to be mash and gravy, snack burgers and zinger wings. I didnt check the contents in my paper bag because there was a long queue. I got home and got my 8 pieces of chicken and others but no zinger wings. And the guys was supposed to check the slip for what he has to put in the and he didn't give me my 2 litre coke as well but at least I noticed that and went back and got it before we left. It's a bit of a distance hence we didn't go back for the zinger wings. This is not the first time this is happening and its wrong because its my money that paid for that stuff and I work hard for it.