@Rachel1616 No there is nothing that can be done. It's somewhat rude of the host not to honor the price that was listed when you inquired, but it's not against any policy. (Did you even communicate with the host about this? If not, ask if they would be willing to honor the price it was when you inquired). What you need to understand is that prices can change at any time, and that isn't just some Airbnb thing. You can be researching airline ticket prices for a certain date and then when you actually go to book it a day or two later, the price may have doubled. Most people know this, so if they see a great ticket price, they jump on it.
Another thing to be aware of is that hosts get tons of Inquiry messages, the majority of which don't go on to book. So hosts don't assume that an Inquiry is a solid booking at all, and wouldn't base their prices or other settings on an Inquiry message.