Don't feel discouraged about a third time Cesar! I know a few people who got close to 700 but still got into top business schools. For example, Columbia told one person I knew they were on the waitlist - but would be accepted if they got a 700 on their next attempt. The schools honestly don't care; if you have a great application, they will accept you, and just tell you to retake the GMATS.
Hope you are still applying!