Life insurance is usually regulated at the state level rather than the federal level; however, there are some laws created at the federal level that life insurance companies have to follow.
“[Insert Your State's Name Here] State Department of Insurance” is usually what the agency that regulates insurance companies is called commonly. Most states have these.
To get in contact with this place, you can ask your insurance company for this information (they may have it and be able to provide you with it; they may not) or you can find it online. You can also call your State Capitol’s offices or your local State Representative to find the address and telephone number of the [Insert Your State's Name Here] State Department of Insurance.