Expired Product

Good day, My name is Sipho I reside in Soweto Johannesburg South Africa, I am a big fan of Stella and I drink Stella only because of its great taste and quality. I am highly disappointed that i had to drink a spoiled product that expired in September 2019 while I purchased the product on 28th of November 2019,but being put on shelf irrespective of the bust date sold in Shoprite liquor Jabulani mall. I shop my beverage at shoprite liquor but if this what I have to do to check an expiring date whenever I have to purchase a product, then I will have resort to shopping at other liquor stores becouse shoprite liquor Jabulani doesn’t care about the health of its customers and a shoprite brand as a whole. I went back to the store the manager gave me attitude and insisted that I can that 6 pack and but I asked her what about my health she didn’t answer me she walked away. I went to the fridge to get that 6 pick to my surprise I had to open 2 different boxes only to find out that they also expired, eventually I found the January exp date 6 pack. I told the manager that the Stella products seem to have a large volume of expired product she looked at me walked away. can somebody in Shoprite Johannesburg South Africa and SAB give me answers on how this happens and is it the customers duties to check the bust date or the store responsibilities? I have receipts and an expired product as proof.