Rude Manager at Ok Danabaai

Ok Grocer Danabaai has the most unfriendly rude manager I ever experienced this weekend. I bought an expired product that he would not exchange for me as I had the slip and the women behind the counter allso remembered me. He said that product does not have an expired date and only an manufactering date. I confirmed with the supplier and they confirmed that the product expired and will send their reps to remove it. But neithet one of them want to exchange or refund me.