Stale bread on your shelves , probably other food as well. Woolies wonder park

Yesterday I just bought off bread at wonder park, my mistake was that I checked a bundle of them and noticed that the best before date is the 27th. And so I just took one without checking again. Now today when the bread is about to be finished , I noticed fungus on the bread . 💔You can imagine the shock and disappointment. I then checked and the expiry date was yesterday. Now it would be my fault but isn't it also your responsibility to make sure that the food on your shelves are still good ? Myself and my pregnant wife had the bread with your chicken and salad. I'm very protective of my family, and any health hazard may arise from this. And you'd be the first I blame as I'm very health conscious about what we eat. I had stomach cramps yesterday and may experience the same even today. I still have the bread and transaction proof on my phone from yesterday. I even took pics on the fungus and date in package.