@Chris1485. Hi Chris, yes her review is not nice, but is it all factually inaccurate? To request a review removal you will need to address each and every criticism and explain why it breaches Airbnb review policy. There are previous review mentions of road noise and other minor issues and most listings are not perfect. Spend a night in the room she stayed in and see if you come up with any of the same issues and fix.
As an aside I am wondering why she was staying in a room down some stairs when she needed a cane. Was she part of a larger booking and would another room have been more suitable? If she didnt mention access/mobility needs I think she is being unfair as clearly your listing does not claim to be suitable for those with mobility issues.
When responding never admit things like you dont live there and leave it up to third party cleaners, it sounds like you are deflecting (which I'm sure you didnt intend to, you were just shocked). I would simply have responded that you were sorry it didnt meet her expectations and wish her well. Your response is really for the next guests.
She lives next door to her hosting and appears to be more hands on as a result. Sometimes I dont greet my guests in person either (I am around the corner) but I do make sure I communicate well and continue to check in via messages, especially the next morning. 9 times out of 10 your guests will reply everything is fine. If they dont then any issues are on them.
Hopefully you were equally honest with your review of her. You have great reviews so if your request to remove her review isnt successful try to focus on the next great set of guests. All the best 🙂