Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 2 empty vials

Very upset! 2 of the 6 vials of product were empty. I have searched extensively and cannot find a way to contact amazon about this product to get a price adjustment. Because it is "toxic" it cannot be returned. This is too expensive to be short 1/3 of the product!(I was finally able to figure out how to contact Amazon customer service - not an easy task! They are reimbursing me for 1/3 of the cost to compensate me for the problem. Thanks Amazon!)