Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: beware seller: shipped diff. brand, lower quality, dead after 9 mo.

I bought the Skullcandy noise cancelling headphones due to great reviews and good warranty.Vibecellular instead shipped Amp'd Mobile heaphones.The headphones broke after 9 months, and multiple efforts to contact VibeCellular about a warranty went UNANSWERED. VibeCellular didn't even have the decency or customer service to respond to multiple email inquiries.More research shows Amp'd Mobile went bankrupt a few years ago, so I'm sure any warranty is void. And, it shows these headphones were at least 2-3 years old when VibeCellular sent them.... instead of the better quality/warranty SKULLCANDY they'd advertised. SNeaky. AVOID.