My mom swore of Cici's Pizza after one day we went.
We had gone a lot when I was around 5-7, but there was one day with such bad service she swore to never go there again.
So my mom is allergic to pineapple, and I love pineapple on pizza (dont kill me) so she ordered half pineapple and ham and half cheese. They made the pizza all pineapple, so when the lady brought it out, my mom asked for them to remake it.
We watched the lady take our pizza into the back and PICK OFF THE PINEAPPLE FROM THE PIZZA AND PUT THEM ON THE FLOOR. I should probably add that the part of the pineapple my mom is allergic to is the juice, because it's super acidic. So even if she picked them off, the juice is already on there.
So at this point my mom was LIVID. She saw a guy with the word manager on the badge, and told him what we saw. He stood up for the worker, saying that she would never do that. We told him to go in the kitchen and check the floor, as the pineapples were still there. He goes back, looks, sees them on the floor, and then proceeds to tell my mom that it could have been anyone, and that we had no proof. There were also no security cameras...
Anyways, we refused to pay for the food, and they didn't object too much ig, cause I remember my mom storming out with little 7 year old me holding her hand. We went to Panda Express instead, which had great service and even greater food :)