Excuse me, I believe there's been a mistake with my order. I ordered the vegetarian pasta, but I've been served a seafood linguine instead. I'm quite disappointed with this mix-up, as I cannot eat seafood. I would appreciate it if you could take this back to the kitchen and bring me the correct dish as quickly as possible, please. Thank you.
You ordered a vegetarian pasta, but they brought you a seafood linguine instead.
Imagine you are an angry customer who has just received the wrong order at a restaurant. Explain to the waiter or waitress why you are dissatisfied, and suggest a solution.