Fried Fish was extremely off

On Tuesday (8 Mar) i bought two pieces of fried fish from Checkers, one was Angel fish and the other was boneless hake as explained by the gentleman who was assisting me. When i got home I ate the angel fish in the evening but left the Hake in the fridge thinking I would eat it the next day. On Wednesday (9 Mar) in the evening i took the fish out the fridge and warmed it only to smell an awful smell, the fish was EXTREMELY off. Even the colour was almost grey. I'm disgusted that a franchise this big could sell something so dangerous! What if there wasn't a smell and I ate the fish thinking it was ok! There is absolutely no excuse to be selling cooked food that isn't fresh, we consumers are trusting that you will sell fresh food when its \cooked food\". I will never ever buy cooked food from checkers again, I have always bought cooked food from pick n pay and have never had this issue. BTW the fish wasn't even boneless as promised by the assistant , yet another big mistake had I given the fish to a child thinking its boneless"