How can I contact the Maine Department of Insurance and Insurance Commissioner?

Answer:
The Maine Department of Insurance maintains

a website at http://www.maine.gov/pfr/insurance/, where many links are ready to take you to numerous helpful resources.

The Maine Department of Insurance website links to complaint forms, legal resources, bulletins, consumer credit protection, financial and banking regulations, and much more, including a "Contact Us" link, which brings up the following details.

Contact Information:
Telephone: 800-300-5000 (toll free in Maine) or 207-624-8475
TTY for hearing impaired: 888-577-6690
Fax: 207-624-8599
Mailing address
Department of Professional & Financial Regulation
Bureau of Insurance
#34 State House Station
Augusta, ME 04333-0034

The site does not list a Commissioner's name or contact details. However, it does list a Superintendent (acting), Eric Cioppa.
Eric's telephone number is 207-624-8403.