SHOCKING SERVICE PICK N PAY ASAP

I place a large order, almost R2000, on ASAP and included a jar of Hellmans Mayonnaise, which has been impossible to source for months now. I still had a jar open of another brand, but I bought it anyway, as it is so difficult to find. opening the jar 3 weeks later, the product was off. I checked the expiry date, and it was for 2024. I sent a message to customer service, and they told me to go to Epsom Downs PnP who would assist me. I was passed from one person to another, and after half an hour I was informed that they could not assist me, and that I must go back to ASAP customer service, and ask them to credit the purchase for me. I wrote back to the customer service, and they told me there was nothing they could do, as the return policy is 2 weeks, I totally accept this policy if the product is perishable, however I don't believe it is fair under these circumstances, especially as I had placed such a big order, and my complaint was legitimate. I will not go back to Pick n Pay ever again, unless they can resolve my issue. Disgusting service Pick n Pay.