I accidentally bought an abridged audio version of a book that I like. I didn't notice that I'd done it until after I'd listened to it and tried to figure out why the funny parts weren't there. I didn't want that version but didn't want to rebuy it.
So I went to audible chat and asked if I could exchange it even though it wasn't the last one I'd gotten. The person gave me back that credit and I was able to download the unabridged version. Yea, Audible!