Selling of expired goods

On Wednesday i sent my siblings to pick 'n pay to buy roasted chicken, amasi and cool drink, when they got home and we were getting ready to eat i decided to taste the chicken and it was spoilt, the kids took it back and got a refund and not even an apology. I then opened the mass and the same with the mass, it was spoilt but i couldn't take it back as the receipt was taken when the chicken was taken back. What is this? Why are you selling rotten food items? This is not the first time i bought meat from this particular store and it was off. <br> <br> I want to know what is it that is done to prevent this from happening and is the store even inspected? Because after eating that small piece of chicken i got food poisoning and had to go to the doctor, that's an unnecessary expense on my behalf and its all because you guys sell meats that are off? I neef to lodge a complaint with the consumer protection act about this because clearly its not a mistake as its happened more than once.