Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A Disappointing Experience

I ordered this notebook case through AMAZON from one of their "third-party" vendors because that vendor offered a lower price than some of the others.Two days later, I get an e-mail from this "vendor" stating that "he's sorry, but he forgot that he put the case on Amazon, and that he no longer has it for sale". He DID say that he would see that my payment was refunded.I have ordered several items from Amazon, and I was not aware that this type of situation could occur.