Spider webbs covered my sealed cereal container

Bought a multigrain crunch cereal. Sealed with their green sticker. When opening I was disgusted to find the top of the container covered with spider webbs. Spider webbs in cereal. I took photos of the spider webbs and sell by date. This is unacceptable when you pay the price you do for this cereal. Who knows what spider is in there. COULD be life threatening.