@Max1638 Airbnb customer service is a mess these days and neither hosts nor guests are having their issues dealt with in a timely fashion. I think you are just going to have to be patient and wait for your case to be dealt with. Don't let them forget about you, because the squeakiest wheels tend to get the grease, so if you don't hear back for several days, give them another nudge. Never hurts to make a comment as to the fact that you've used Airbnbs many times in the past, but if they won't deal with your issue efficiently, you'll be using another booking platform in the future.
You seem to be an experienced and savvy guest but I would suggest that in the future, if there is a sizable chunk of money at stake, or a strict cancellation policy, or a long term policy for a long term booking, that even if a place is available to be Instant Booked, that you first use the "contact host" option and communicate with the host so you are assured that there won't be any issues before committing to a reservation.
Good luck, I hope you get a resolution soon.