Be sure to check any of your Spam/Junk folders for your e-mail.
Also make 100% sure you are entering the correct e-mail in the password reset
. Even if it's incorrect or an e-mail that doesn't even exist, it will still tell you "Further instructions have been sent to your e-mail address."
which may make you think you've entered a correct one.
If all else fails, try contacting them through Recover Lost Account