Instruct: Classify an Amazon review into positive or negative sentiment.
Query: refunded with no explanation

I can't write a review for the product because I never got it. I was refunded to my credit card, but there was no explanation and no notice. I just kept waiting for it to arrive. I guess I could try to find out what happened but I don't feel like I should have to do the legwork to find out why the product didn't arrive and how it could be replaced/redone.