Pick N Pay rotten products

Today I went to pick n pay wonderpark and purchased a Ace samp quick cook. When I got home, I started preparing to the samp. So I poured the samp in the water and noticed that they was some brown things floating in the water. When I checked thoroughly, it was dead worms. Some of this dead worms was still in the pack. I took pictures of it. I then returned to pick n pay to complain about this. They just refunded me the money that I bought the product with and pretended as if this its a normal matter. They made me feel like I was lying or something. Mind you I used my petrol to go return their rotten product. They really inconvenienced me. As customer I don’t think they handled the matter correctly!!!