As a broker, I am always protective of all of our clients,regardless of which agent is the designated representative. However, I also know that some of the initial stories I hear from both consumers and agents leave out part of the important parts. It often requires that I secure answers to direct questions before I can ascertain all the facts and determine what I, as broker, can do to ensure clients are properly represented.
What reason did the agent give you for not delivering your offer. Agents must deliver offers, although, the offer may need to be in writing. If the seller or listing agent has provided specific instructions, such as "Signed disclosure and preapproval must accompany offers" and the agent relayed this info, the agent was acting properly in relaying this crucial data to you.
Can you expand upon the "need to get money in from USDA"?
I suggest that you contact the broker. I do not recommend that you hire an attorney at this point, nor do I recommend that you contact the association at this point. If you believe that you were not properly represented, contact the managing broker's office and see what the broker can do to meet your needs. If that fails to satisfy you, and you still believe you need additional support, then contact a higher authority. Chances are very good that the broker will resolve the issues promptly.