The Deer and the Cauldron: 3-volume set

I bought this set of books on release, the first two books were fine. The third one which I took on holiday had missing pages and pages in haphazard order in the middle of the book.This is a set of 3 books so I could not find out this problem until I got to the middle of the LAST book which was over a month after the purchase\i was quite upset at this and would like a replacement. I dont know how to do this on AmazonDO NOT BUY THIS SET