Penicillin Poisoning fresh from KFC Hartbee****rt

To receive a burger that looks nothing like it is advertised or to get chicken pieces that is halve the size than normal, is normal these day's. But when your kid gets penicillin poisoning from a freshly served KFC meal.... that is ********. The branch manager can only replace the burgers "who wants more poisoning for their kids?" The news papers will not publish without KFC consent " they will never give it". What can we as consumer really do? Powerless!