Rotten food Bought numerous times in Atholl Square

On a weekend, I first bought a green veggie made combo for salad. I got in my house and it was rotten, I returned it and took another one. They apologized and I left with another pack. I got in my house and found out that the pack is also damaged. I could not waste my time going back to tell them same thing they already know. Waste of time and petrol for me. But yet again, during the week, i went to same spar and bought a chicken, to my surprise it is not eatable at all. It is damaged, what can I do. It is after 8pm and I cannot return it, but even if I return it, I don't see nor rust if I will get any good food product from that store. I am concerned about the safety of what we eat from them. Is this a good business to support in our community or area of residence?