chicken bone in chicken nuggets, no responsibility

A week ago I bought chicken nuggets at Pick 'n Pay hyper market on Atterbury road, Pretoria. <br> <br> Next day my son took them in lunch box and came home with broken incisor because there was a broken chicken bone in one of the nuggets. I went to Pick 'n Pay and spoke to the branch manager and all they said was it's not their responsibility because they're just selling what they get from suppliers. Although it was one of the Pick n' Pay products with their customer center number on the label, the manager kept saying that they have to contact the suppliers and I have to wait to be contacted. <br> <br> Now a week has passed, nobody contacted me yet and my son went to a dentist and had to fill the crack yesterday. It's really disappointing to see how the branch manager handled the matter. I wonder if he really contacted the supplier?