Bad juices

I bought groceries from Woolworths in jabulani mall on the 26/05/2018 I spent close to R900. I bought the 1.5 liter juice only to find out when we opened them yesterday they were sour. My partner went back to the shop to request for an exchange not refund and he was told it is a lose for the store. He then asked to speak to the store manager, who aslo refused to exchange the juice. They advised my partner it was his lose and that they cannot exchange for him. They also told him the date for exchange had passed but on my receipt it states that the last day for exchange or refund is 25/07/2019. This is still in the time frame. I don't want the money back just want an exchange. Is it to much to ask for. They need to brush up on they customer service.