Instruct: Classify the given review into positive or negative sentiment.
Query: Flimsy, defective product...no refund...buyer beware!

When the Mangroomer arrived, I immediately noticed the flimsy materials making up the product. I turned the switch to the "on" position, and nothing happened. I tried different batteries to no avail. Amazon indicated that I should return the product to the manufacturer. I mailed the product back to the manufacturer and indicated the product was defective and I would like a new Mangroomer. Several e-mails & phone calls later, I have yet to hear from the company. The Mangroomer is a waste of money, and I am highly disappointed that Amazon would sell such a shoddy item!