There is nothing you can do about from an income tax perspective. You can contact the former 401(k) plan administrator to determine if they acted properly. The company probably didn't do anything that violates the law. However, if you think they did, you can file a complaint with the Employee Benefits Security Administration (EBSA) of the U.S. Department of Labor, or consult with an ERISA attorney. If you want to prevent something like that from happening again, you can rollover your 401(k) to an IRA where you will have more control over it.
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