Sponsored a children's marathon with expired food

Was attending the Gauteng Junior Atletics Central Gauteng Development Race at Sam Ntuli Stadium in Thokoza sponsored by Pick 'n Pay. When the kids finished running they were served food but I noticed that the Chelsea Buns had a best before of 21/05/2015, approached the people that were giving out the food and on Pick n Pay representative said it was a mistake and I asked them nicely to then remove the chelsea buns from the packet of food since it might make the children sick but she refused. Then another representative said that if I complain Pick n Pay will stop sponsoring such things so I must keep quiet and this is not their fault they found the parcels like that yet their are putting our kids lives in danger.