Bests & Worsts Reviews from Amazon

I ordered this large pack of play-dough for my classroom. I received it very quickly and my students were very excited to use it in the classroom. Each of my students got a container of play-dough. One student brought their play-dough to me and told me there was something wrong with it. It appeared that there was mold on the top of the product, the consistency was sticky mush, and smelled of something rotten. I would like a replacement for this product. This seems like an unsafe thing for my students to be exposed to. Thank you.