Disgusting service

We bought eggs yesterday at pick n pay in benmore Gardner's shopping center in sandton now this morning when I was about to make an egg after I broke it I discovered that the eggs were rotten they had that white thing and I have been trying to call the store but I am not getting any response and tried to call the customer care also didn't receive any help that lady just said I must go to the store and get another batch of eggs now my question is if I am taking another batch how am I going to know if that batch is fine how can I trust that it doesn't have a problem and I am so angry about the way their customer care isn't of any assistance