Viator does not publish negative reviews. I've seen this mentioned on other forums as well.
I did two tours through Viator - one was great, one was not. I left reviews for both, only the positive review was published.
The quality of the tour is not the responsibility of Viator, I don't hold them responsible for that at all. But Viator advertises and sells the tours, they are responsible for proper representation. It is dishonest to publish positive reviews, and leave out the negative ones.
Not cool at all. For this reason, I will not use Viator again.
This person wrote the review because of "dishonest advertising" at Viator. Reviewer claimed that he or she wants Viator to offer any options to resolve the issue.
The most disappointing in user's experience was misrepresentation of tours. Author liked the most ease of booking and detail. The author asks this business to immediately contact him/ her to briefly discuss his/ her negative experience with the company.