You may place complaints with;
The local MLS,
The Calif. Assn. of Realtors
Please think about this; what do you hope to accomplish?
Good luck and may God bless
There's a lot that goes into this. So, as Ron suggested, I would sit down and talk to the agents broker to figure out exactly what happened and why. Usually, it's a case of a consumer not fully understanding the process or what happened throughout the transaction.
Note, I'm not trying to say your wrong, just trying to make sure you find the facts. There are some unethical agents out there, but most agents try to follow the rules.
I hope this is a misunderstanding.