Instruct: Classify the given review into positive or negative sentiment.
Query: DEFECTIVE PRODUCT AND AWFUL CUSTOMER SERVICE

I bought a DVD from this seller and it was defective. I contacted the seller and he told me to return it back to him to see if there is anything wrong with the DVD. I sent it back to him and he writes me an email stating nothing is wrong with it and sends me back the DVD in my envelope with the words "Refused Back To Sender". What kind of customer service is that? I do not know what kind of DVD player he has but I have a Panasonic and Sony that plays all of my other DVDs just fine. This DVD does not work and yet the seller refused to take his defective product back. I am in the middle of disputing this erroneous transaction! DO NOT BUY FROM THIS SELLER! He will screw you over! What a waste of my time and money!