the site and the processing of the applications is in back log so while frustrating it's not surprising that you haven't yet heard. i would give it a little more time and then try calling back. hold off on applying a second time.
on october 24th i applied for health insurance coverage through the healthcare. gov phone line. i just called to see why i have not received a letter regarding whether i qualify but they said they cannot tell me anything. should i just apply again?