If you ordered and didn't receive the game you need to contact Amazon Customer Service. Go to the bottom of this page and under "Let Us Help You", click on "Help". On the next screen in the right side column click on the yellow "Contact Us" button.
Fill in some info about the problem and then for question 3: How would you like to contact us? Select PHONE. You can do an online chat but I have found that having them call you is quicker and easier. Likely they will just send you out another copy as occasionally stuff does get lost in the mail. Amazon CS has always been friendly and helpful to me.