Listing never activated, but now booked?

My listing was never activated by VRBO weeks ago when I tried to start there. I've only been a host for 5 weeks total.

It said I had to call to resolve the issue and then the phone number never went anywhere (said invalid number.) I've been booked pretty solid on another platform so I just decided to leave it alone until I had the time to figure out the issue. Now I just got a booking but it's a high occupancy weekend and I'm already booked week sago. How did this happen? I will refund or cancel the VRBO but I've literally never gotten a booking or inquiry because my listing said unlisted.