Hi @Chris1664 We had to cancel our very first Airbnb bookings too.... a major water problem in the Studio that needed repairing. I contacted Airbnb and explained the situation and they cancelled the bookings for me. They then asked for photos of the damage so they could assess if we should be fined for the cancellations. Thankfully, we weren't.
The repairs took 2 months.
Firstly, I would messaged them explaining the urgency of the situation and hopefully someone will get in contact with you asap. This happened to us, and someone phoned us to assist.
If you're not happy with your response, I would phone your local Airbnb office if you have the number.
Most importantly, Don't cancel the bookings yourself.... let Airbnb do that.
Best of luck