If you figure anything out let me know.
Unfortunately you don't have much recourse. You can report the lender to the BBB but not much else. You'd be amazed at how often this happens. The problem is that many brokers only lock loans for 5 or 15 days because they make more commission than a 30-day lock, so even if he did so your lock may have expired. One of three things likely happened:
1) he never locked the rate to begin with because he couldn't get a rate as good as he quoted.
2) he really did make a mistake.
3) he locked you for a short period of time and it expired.
Do you have any written communication from him on the quoted rate? Maybe you can appeal to his higher-ups? Sorry this happened to you.
E Mortgage Management
800.793.9633 ext. 156