If you need to reach the Department of Insurance you can try to call them.
This is from the IDOI website:
IDOI OFFICE LOCATIONS CLOSED UNTIL FURTHER NOTICE:
Due to ongoing COVID-19 concerns, office locations of the Illinois Department of Insurance are temporarily closed, as staff continues to work on a limited scale. Consumers can submit insurance complaints electronically:
IDOI Message Center or call 866-445-5364. We are working to process and respond to complaints as quickly as possible, but please understand that the response time to answer calls and process complaints may be extended. Thank you.