This almost happened to me when i enrolled last month. It turns out i didn’t scroll all the way down to click ‘enroll in coverage’ which completes the process and fully enrolls you. I’m not sure if you can fix it, you might just have to wait until next enrollment unfortunately.

Partner benefits helped me out before but I called them within a day of missing. And I had moved so I never got the information about it. But they told me they wouldn’t do it again so you may be out of luck. Try emphasizing you won’t have any coverage.