@Eileen27 I think that hotline has been retired! Try contacting @airbnbhelp on Twitter. You can send them a direct message and they will ask for your name and the email address and phone number associated with your account.
In the meantime, I found your place by going to your Airbnb profile, so it is definitely live and available. Is it possible the guests have put in dates that are already booked? Either way, I would send them a link to the listing they want. Since they are returning guests, you can include links in your messaging with them.