Messaging doesn't work either. I tried

HI NYS has great health insurance, especially for children. That would be your best bet.  They do have brokers and a phone number to call.
 People are generally helpful.  The website is not the easiest to navigate,  but if you have some time, play around with it . I think insurance agents generally will be brokers for health insurance.. and I do think they will help with NYS marketplace. Perhaps your own insurance agent may be able to do this.
 Also NYS also has navigators at various agencies to help. Good Luck https://nystateofhealth.ny.gov/
https://info.nystateofhealth.ny.gov/sites/default/files/September%202019%20IPA-Navigator%20Site%20Directory.pdf