Pick n Pay having expired goods on the shelves

A week ago I bought my son a pack of juices for his lunch and just yesterday I checked the expiry date on the last three of the juices that remained to my surprise they had expired in March already! How could such a reputable company do such a thing? It doesn't matter where any other branches may be but surely they have the same principles to check such things, this morning my son had stomach cramps...that just got me so angry cause it could've been one thing only that got him sick These were krush juices at Pick n Pay in Kwa -Thema.