Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Faulty product -- again

This is the second product that the seller sent me. The first router was faulty (verified by Linksys), so I mailed it back (I paid for return mailing charges). The seller sent me a second product. Again, it didn't work (verified by Linksys). I'm not sure if they just laughed and sent the exact same router back to me, or if all of the products they got from Cisco are bad. I again have to pay to mail it back. I will be requesting a full refund. I will never use this seller again.