Plastic inside wors

I went to do groceries as usual and that my main store, I bought Beef & Braai Wors for R37.09. I cooked it on my braai pan, when I was dishing cutting the wors,I found 2 pieces of clear plastic inside the wors, by the look of it, it got in while they were making wors, I dnt ow what would have happened if I swallowed it. I'm very dissapointed because I was planning a nice dinner for my Fiance now had to throw it away since I do not knw what I will find in other piece. The number on till slip which is ***/80 is ringing and no one is answering. I am very disappointed with the quality of product, I hardly buy meet in this supermarket and I do not think I will do again.