Shame that Viator/TripAdvisor allows businesses to use an automated replay system with suggested explanations. The one we choose was that we didn't reach the minimum number of pax required for your chosen day. Shame you didn't take your time to read through your email, but rushed to write a negative review. And if after notifying the incidence to TripAdvisor the reply a business gets is the following, things are definitely getting even worst. We have completed our investigation into your concern and have also evaluated all other aspects of the review in question. The review complies with our submission guidelines and will remain published on Tripadvisor. We encourage travelers to take the whole of a property's reviews into account when judging it. If most other reviews are positive, travelers are likely to see a negative as a mere aberration.