Disgusted with all the staff and their behavior. They messed up my order and I brought...

Disgusted with all the staff and their behavior. They messed up my order and I brought the item in that was incorrect and handed it to them along with my receipt and the staff had the nerve to laugh about it and say that they won’t remake it and that I’m not getting anything from them because they’re sure they did it right. Then they said unless I bring in my whole bag of food. Why is that necessary if I literally handed them the only item that was messed up and it clearly wasn’t what was on the receipt. Staff needs more intelligence and training. I asked for the manager and some guy was saying that he’s the manager and he’s not redoing it, I asked for his name and he wouldn’t give me that either. After being frustrated and walking out, my boyfriend went inside and brought the whole bag in which was unnecessary in the first place, and they redid the item because it was WRONG LIKE I HAD SAID.