So I'm also another of the SuperHosts affected by the review which was a total lie. As a matter of fact, we accepted guest's alteration request since he cited his daughter's medical issue, and he returns the favour by giving us a 1 star.
Contacted Airbnb and quoted their policy where they should be removing reviews where "Reviews that do not represent the author’s personal experience or that of their travel companions"
All I got in return were two standard answers that everyone of you will have got -
a) Review does not violate our policy (you can try to prove it otherwise in any way but they will behave like bots and keep repeating the same line)
b) You can respond to the guest review with your viewpoint (load of crap since you will come out looking bad whatever you reply and most guests would rather trust the one bad review over tons of positive reviews)
And lastly when you tell them that your rating has also been screwed, they have no answer but to say it will get better after you get a couple of positive reviews.
The whole conversation will continue in this loop till either you give up and hang up, or they put you on Mute and do other things till you get tired and hang up.
I don't know who will read this rant of mine, but if you do, please pass on one suggestion to whoever at airbnb can listen -
Don't allow guests who have cancelled or altered their dates to write reviews because 99% of times they will screw over hosts by either giving a bad review or holding them at ransom with threats of negative reviews in return for waiving cancellation charges.
Their customer service are simply too vain to understand that their callous attitude to this issue can result in loss of jobs and livelihoods beings destroyed!