Instruct: Classify a review as either positive or negative.
Query: WORST SERVICE EVER!

NEVER RECEIVED THE BOOK I ORDERED. EMAILED THE SELLER WITH QUESTIONS ASKING WHY THE BOOK WAS NEVER RECEIVED. NO RESPONSE FROM SELLER. STILL TO THIS DAY HAVE NOT RECEIVED THE BOOK. TERRIBLE SELLER. TERRIBLE CUSTOMER SERVICE. DONT TRUST THIS SELLER.