I’m fairly sure you will be receiving a refund and not just on that meal.

Personally I would report them to health inspectors. Maybe ?? That was a just one time screw up??

As mentioned it’s doubtful there will be a problem passing any you have inadvertently eaten, but one more reason to file a complaint, what if you were to have a medical problem due to it? They provide a service and are responsible for the safety of foods.