Metal in Alpen Nutrific

I am a big supporter of the Nutrific range and my family loves it as well, but today I had a very bad experience, as I was eating my Nutrific I bit on something hard and it turned out to be a piece of steel - almost broke my tooth, I do not have any metal in my mouth so it had to come from the Cereal, disgusted as I am now wondering where it came from? Someone on the packaging floors piercings? Mouth? I took a photo as proof Not Good Alpen Food