Problem with book.

<p>I bought a book on half.com and it came in the mail and is not as described. the seller had it listed under the hardcover section and it was priced as a hardcover. he said in the description it was international edition and i didnt know that all international editions are soft cover. if the seller doesnt let me send it back for a refund what can half.com do to help me? do i just file a complaint? do they make him accept it back? do i just learn a lesson and am s.o.l.?</p>