I'm sorry to hear of your experience and unfortunately as you are already aware, you cannot leave reviews for cancelled reservations; you can however suggest a change request directly to Airbnb.
Can I ask, did you request the additional money via the resolution centre or cash? Cash exchange is not permitted by Airbnb under any circumstances.
Also were there any red flags which you could perhaps learn from for future bookings to avoid similar situation i.e., does the guest live in the same town/ city as you? Also do you ask your guests to tell you a bit about the purpose of their visit? If there is more than one guest, since Airbnb only verify the main guest, do you ask for some information about the second guest in order to have an idea who is coming into your home, more so since you also reside in the property.
I think this is one you will have to put down to experience, learn from it and use the lessons going forward in deciding which guests to approve or perhaps request more information. There will also always be some who slip through the net unfortunately.