Instruct: Classify the given Amazon review as either positive or negative.
Query: Inacceptable, awful

I bought a book from this seller but I have never received it ! I contacted them and wrote 3 letters (through Amazon) asking the reason and claiming non delivery of the book but the seller don't care to the letters and has not replied to me ! I feel their conduct is not respectful. Any way after about one month of transaction I have not yet received neither the book nor any answer about it !