Checkers sells 6 months expired juice!

I went into Checkers Jukskei Park on Friday the 15 of April 2022 to buy orange juice, which I opened to drink today, Sunday 18 April 2022, after drinking I realized that the juice tasted odd, so I checked the expiration date, the juice had expired in October 2021! I went to the store to speak to the *********** manager who said to me that it's not possible for the expired juice to have been on the shelf, I look at him shocked, how can you say it's not possible when it's literally in black and white infront of you, I then explained to the manager that I have multiple conditions and if I get sick I want to hold checkers accountable because it's entirely their fault for not checking the dates of products on shelf, he says he isn't high enough to tell me if that can happen, so I ask him to ask whoever is high enough, cause not only do I have serious conditions, I also live alone so if anything has to happen, who gets held accountable? The manager played completely dumb and acted like the entire situation was my own fault, he multiple times said its not possible and he assured me that something like that couldn't happen when in fact its happening right infront of his eyes. I am beyond disbelief by the utter stupidity and lack of concern for the health and well-being of their customers, how can a juice that expired 6 months ago be on the shelf for all to purchase? This is beyond ridiculous, selfish and just overall poor service, perhaps the management and staff should spend less time laughing and joking with each other, then something could actually get done.