HI @Catherine365 I know it's a massive headache, I had the same issue here with some local hosts, and this one host in particular was the worst - he copied blocks of text the day after a local meetup that I hosted!
I contacted him and suggested that if he wasn't comfortable writing his own text that I'd help him create something, but stealing my copy wasn't a solution. He was very uppity about it and I didn't want a fight so I dropped it. I do love to read his reviews indicating things like "there was no great coffee shop on the corner as described" "there was no piano as is written". Ha.
Unfortunately, I don't think Airbnb will have your back on this one so I'm afraid I can't offer any strategy for you, I can only commiserate. I am going to see what I can find out, as I'm pretty certain that copy that we write isn't public domain, but I'm not sure how it's categorized.