I would call the waitress and refuse to pay for it.
Reason being : Recently at the Big Apple Chinese restaurant a roach was crawling across a buffet table, in and out of the serving pans , I quietly called the management showed them the live roach. The manager became very rude , stating he could not help a roach in the food..WRONG , that is what health department inspections are for. Well the shit was on, I called the police as the manager demanded I pay for the 3 buffet dinners we were having.When the police arrived I found out I was not the first problem at this restaurant, and they gave me a list of restaurants to NOT go to because of health issues. My next step was to call the health department and lodge a complaint. I did tip the waitress but once the police arrived the management changed their tune on demanding payment. I refuse to eat or pay for anything that is contaminated by any type of bug, that is disgusting.