Month expired lays chips

Yesterday I purchased a big packet of lays for my daughter and a yoghurt at shoprite delft mall, when I got at home and something told me to check the expiry date and all to see the pack had expired on the 29th of April 2019. That is month today, how could shoprite still have expired chips on their chelves. Imagine if I have gives my daughter those month expired chips thats food poisoning and she could have been sick with out me knowing its shoprites expired old chips. I could have spend lots of money to take her to doctors shoes she have ate those old chips. I want my money back this is unexaptable.