I have a kind of standard reply for these kind of people.
I simply point out that this is the main frustration about the AirBnB review system. People not reading the listing properly and blaming the host for their mistake. I ask future renters to do all hosts a favour by carefully read before they book, to safe them and the host from dissapointment.
I do not go into details, nor defend or excuse myself against the bad review, that would be admitting I did something wrong.
My descriptions are 100% accurate, nothing polished or exagerated, if they cannot read, not my problem.