Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Frustrated...

I must start and end with saying that Amazon.com have been great!The seller who was supposed to ship the CD, however, was very poor. I did not receive my product on time and instead of receiving the product I got notice of a refund. Amazon have been great to send the refund in a timely manner but I'm frustrated that I didn't receive the product.Again Amazon.com were great but seller was not.