Generally Amazon will refund any purchase. I wouldn't much worry about trying to get the issue fixed yourself (dealing with Amazon). They really don't care if a author's/publisher's book has typos or other grammatical errors in it. It's kinda like asking Barnes and Noble to "pull a book from their shelves" for the same reason. Ultimately the responsibility lies on the author/publisher (Sometimes you can click on their name at the top of the listing though - and find their email contact info).
If not, simply leave a review stating the issues.. I GUARANTEE the Author/Publisher will fix the issues then. Otherwise, he/she may not get any more sales. However, please make sure you "UPDATE" the review if and when the Author/Publisher leaves a comment about fixing it :-)
