Two copies of one book

Question

My order # 058-4661446-7876322 and #058-0158442-3685164 are both the same book. I certainly do not want two orders of the same book. I ordered 3 (three) Robert Crais novels, The Monkey's Raincoat, Indigo Slam and The Forgotten Man. Can you help me delete one of the Indigo Slams and exchange it for The Monkeys Raincoat. I am so frustrated with the mistakes regarding my ordering. If this order is not straightened out there will be no further ordering of books from Amazon.