Rotten wors

I bought bulk wors at Makro Strubens Valley branch and noticed it had a bit of a funny smell. But I just thought it was due to the blood. When I got home, I divided the word into smaller portions and put it in the freezer. After a week or so I decided to braai some word and when I defrosted it, I noticed it had gone green. Even when it was braaing it had a funny smell. Needless to say the taste is disgusting. I can understand in this age of a Listeriosis scare how they can even risk selling such half rotten meat to people. I am absolutely appalled!