If you are wanting to delete your Airbnb account, see below.
Go to Account ---> Settings ---> Cancel My Account
"In order to reopen the account, you'll need to contact Airbnb. When you cancel your account, any reservations you've confirmed—as a host or a guest—will be automatically canceled."
I don't know what to tell you @Tess-and-Matt0. When I made this Help Guide, I did not click on the button as I did not want to delete my account. I would contact Airbnb and they can either do it for you, fix the issue you are having, or walk you through it. Sorry the Help Guide did not help you.
A listing did not become available and have not finished the listing. How can I delete it?