What happens if someone doesn't review my essay in the 9-12 hours given?

Nothing happens. They can still be reviewed. If u rushed them u can get a refund for the rush by clicking report delay.

This happens occasionally when a lot of essays are submitted for review in a short period of time. No matter how full the essay review queue gets, though, I've always still gotten my essays back within 24 hours of submitting them, even if it was more than the expected 8 or 12. If you used Karma to fast-track your essay, you can get a refund by clicking "Report Delay" by the essay your waiting for in the "My Essays" section. If not, you should just keep waiting, and they'll come back eventually. Unfortunately, College Vine hasn't created a policy that ensures that their expected times will be met all the time yet, so we're hoping that something like that comes around soon, but 24 hours is still a very good track record compared to literally any other essay review service. I hope this helped!

Just keep waiting. The reviews will come eventually.