Jeremy
You will want to contact the Southwest Riverside Association of Realtors (see link) to file a grievance. Also, contact the http://www.dre.ca.gov and click on consumers to file a complaint. They have a fillable PDF form that you can complete and submit.

Good luck.

You could also send a written complaint to their broker and to the local Association of Realtors that had the listing in their MLS. If we don't speak up against bad practices then we'll all get more of the same.

Contacting the real estate commission in the state is a MUST. Your actions now can save future Buyers (yourself included) from a similar outcome. With so many foreclosures and short-sales currently on the market across the nation, even experienced Realtors are facing unfamiliar situations. Banks and lenders are handling offers on these properties in their own manner...often with little regard to standard, local real estate procedures. In the future, if you are told that a bank is only reviewing one offer at a time, not looking at offers until a certain day of the week, has turned down your offer etc....GET IT IN WRITING! It could keep that "good deal" that you were hoping for from going into the hands of another Buyer.

You would need some sort of proof of it to file a complaint. You could contact the realtor themselves, do it in writing so you have arecord of it, ask why. You can also ask for proof you offer was presented. Then your move would be to the real estate commission of CA.