I purchased four 12 can cases of Diet Pepsi Caffeine Free in June 2021 from Shoprite in Flemington, NJ. I opened a can of soda last week and the taste was not right (flat metallic flavor). I returned the Pepsi product to Shoprite for a refund and was told that the soda had expired in July and a return would not be honored. According to this logic, I have one month to drink 48 cans of soda before it expires…ridiculous! I have cans of other brands of soda that last for more than one month. I am very disappointed and request a response.