Instruct: Classify the given review into positive or negative sentiment.
Query: Poor quality and Poor Customer Service!

We brought two Nanos, both went bad (LCD) within 6 months. Got 2 replacements, and then the 2 replacements were sent back again. Can't believe the quality is this poor! On top of that, the CS was really bad. I had one unit sent back and forth 5 times! You could not email them, called the 800 number, was on hold (being transferred) for over 45 minutes, still could not get the problem resolved! Very very frustrated. Will never buy this again!