From your review of the host, it seems like you did a bit more than opened the door, saw the stairs and left though, Michelle...
"Buyer Beware! The photos on this listing are a complete misrepresentation. There is nothing “homey” about this place. There are no rugs on the floor, no decorations anywhere, the bedding is unclean, the bed pillows are old and dingy. There are steep stairs inside the home so you have to walk either up or down to get anywhere - not good for elderly people.
The grass is uncut. It is in a loud crowded area, which we did not like.
We could not stay there due to my elderly mother not being able to navigate the stairs. We were displaced due to the Hurricane and Joseph lured us in by putting a special message “for anyone displaced by the Hurricane”. Joseph was unresponsive. We were forced to cancel. Completely dissatisfied. Do not be taken advantage of by this host! Take photos! We are in mediation to get our $$ back"
Perhaps you neglected to properly assess whether or not the property was suitable for your mum's needs *before* you booked the house (its clear from the pics that there are stairs in the house) but then, for reasons best known to yourself, felt you should be entitled to overturn the host's cancellation policy and break the terms of the contract you signed up for on booking? Good luck with finding an attorney to take that on - and might be a good idea to get your story straight first.