we are sorry to read this from you.
Unfortunately we did not receive any email from you as you probably sent this request to Viator and we cannot know why they did not reply. Our agency name is Veditalia and we are responsible for organizing the tour. We suggest you to contact directly Viator for further check.
Furthemore we could have rescheduled your tour for November 5th if we were informed; you could have also changed date on your own through Viator website or cancelling the tour on Viator until 24 hours before the tour starting time in order to receive full refund.
Next time please check if the booking time and date is suitable for you and contact the right supplier for assistance if needed.