@Vanessa1511 I would suggest you try to get that review removed, on the basis of irrelevancy. Although you were responsible for not understanding that someone can instant book and just show up, without any confirmation from you, I see that your stated check-in time is 3pm, so him showing up at 2:30, and then giving you a 1* rating and a review that makes it sound like you were remiss for not meeting him on time, makes his written review irrelevant. Also irrelevant because your ad clearly states that you are not allowed to accept Egyptian men in your home-share, but he booked anyway.
Your now 3.67 rating is going to hurt you a lot.
Also I would suggest you retake your photos to attract a better caliber of clientele. Your photos are out of focus and dull, and the beds look like someone just got up out of them, with all the wrinkled up sheets. Nothing wrong with simple digs, but make the place look nice, so good guests book. Take a couple photos of the bedroom, from diffent angles.
Your wording re "should be clean and comfortable enough to get a good night's sleep" is odd. It's either clean and comfortable or it's not. Your wording makes it sound like you can't guarantee either.