My name is thobile maphanga,i have a complain that i bought a 150g of doritos sweet chilli pepper on the 12th of september 2015 for my 4years old son.My problem is dat my son and i ate those snacks and now he has a loose tummy,only to realise that thesee chips has an expiry dat of 19SEPTEMBER 2015,they are not fresh and tastes old.I tried taking them back to where i bought them but the shopkeeper refused to exhange even to refund me back my mnneu saying that he wont becuse i've already open and ate them which means its my loss andtthere is nothing i can do about this please help me