Instruct: Classify a given Amazon review as either positive or negative.
Query: Gravely disappointed

I received this item and found it not to be what I expected. First I thought it was a mattress topper and found OT just a thick piece of foam. The worst part was that there was a large chunk missing out of it on the side. I had not even taken it out of the plastic covering so this means it was shopped damaged with this chunk of foam missing out of the side. I was very,very disappointed in this product and to date I have not received my return invoice so that I can return this piece of junk.