Selling Rotten food

On the 25th I bought a few items at Roots Bushbuckridge, including fish; unfortunately, I wanted to clean it before I froze it. The disgust I felt when I unpacked the package was overwhelming; the fish was falling apart, and beneath what looked like normal fish was a head of different fish with no body. It was clear that instead of disposing of the spoilt fish, they repackaged it. They were black and smelt really bad; they even included hake tail in a massbanker package. I've sent an email complaining about this and I haven't received any feedback.