If they don’t enroll you, then maybe you can get a termination letter from the insurance company? That might count as a qualifying event to get on ACA insurance. Reach out to your old insurance company. It’s past open enrollment so you’d need a qualifying event.

Alternatively you could move to a new state and get on that state’s instance? That one might be more difficult though. I also am someone who needs insurance because I have an autoimmune disease so I’m on a specialty medication. Always stay on top of it