Expired product on shelves Ouma Rusks

We bought Ouma rusks from Pick n Pay on 29 August 2022. Upon arrival at home I made coffee with the rusks only to have a very bad taste in my mouth, my husband got a runny stomach. When we checked the expiry date it is dated BB 13 Aug 2022 Batch code ***769.

I am really disappointed that such a big corporation does not check validity of products in shelves.

What is we had gotten the worst food poisoning???