Usave Complaints

I bought stir fry this afternoon at around 15:55 then when I opened the container, it was rotten. I went to back to the shop to lodge a complaint about the product. The security and the cashier were friendly and willing to help then they called their manager who came and started asking me that whe is the plastic not full, I told him that I bought it like that and usually stir fry doesn't fill the container. He started shouting and mocking me in front of other customers calling me names and refused to refund me my money telling me to go to hell. Everyone started laughing.