Since I didn't get your initial reply, please don't hesitate to leave follow up questions.
1. Regarding the complaints to the labor board.
Unfortunately if you are an at-will employee, your employer is free to change the terms and conditions of your employment, including the way in which you are compensated, at any time for any reason with or without any prior notice.
This stems from the employment at-will doctrine, which is codified in California Labor Code Section 2922, and states:
"An employment, having no specified term, may be terminated at the will of either party on notice to the other. Employment for a specified term means an employment for a period greater than one month."
Therefore, unless your employer is breaching its contrcatual arrangements with you,
failing to pay minimum wage (which is required for commissioned employees) or otherwise
violating the labor code (which, based on the information you provided, is likely not occuring)
there wouldn't be anything to take to the labor board.
That said, it never hurts to call them and make a complaint, which you can do through finding
your local office here:http://www.dir.ca.gov/dlse/districtoffices.htm
2. Other issues (fraudulent practices)
If, however, you were to go to the attorney general to report the massive fraud that is taking place,
you would receive whistleblower protection, which prevents your employer from terminating
you in retaliation for making a complaint to an outside governmental agency.
If your employer were to retaliate against you in any way, then you would have a cause of
action for retaliation or wrongful termination in violation of public policy.
As I first mentioned, please let me know if you have any follow up questions or if there is any
additional information I can provide to you.
Thanks and best of luck!