rotten food sellers with no conscience

Spar Atholl in Sandton sells rotten food. I went to confront them and they gave me a "I don’t care" attitude,the manager was dismissive and very arrogant. They sold me rotten cheese and french polony which gave me and my wife a stomach bug, when we returned the food the manager didn’t even want to talk to us, instead he told the supervisors to offer us chicken and a cup of coffee and just forget about this. I confronted him personally and told him how much I feel disrespected by his attitude and the offer of a chicken.I mean I used petrol to get there and most importantly my time, "you sold me rotten food but you still offer me food".Their service and attitude sucks and they undermine people. check the expiry date on the food items. please help me