You've checked the spam folder as well as the inbox, and if you have a rescue email address on the account then you've also checked that email account ? You should also be able to reset your password by answering the account's security questions on the http://iforgot.apple.com
If you still can't find the email, and you've tried clicking the reset link again, then contact Support in your country, they should be able to reset your password (and security questions).
Contacting Apple about account security : Contact Apple for help with Apple ID account security
If your country isn't on that page then try this form to contact Support : https://www.apple.com/emea/support/itunes/contact.html
After resetting your password you might need to log out of your account on any iOS devices that you have by tapping on your id in Settings > iTunes & App Store (Settings > Store on iOS 5 and below) and then log back in so as to 'refresh' the account on them.