I was planning a trip to Ireland with a friend a month in advanced and I accidentally booked it for the next day (I’m not even in Ireland!), I immediately called Viator to change the date and after keeping me on the phone for half an hour and “trying to help”, they said they couldn’t accommodate me because the system wouldn’t allow it. They said that I could dispute it with my credit card company, so I asked them to send me an email that they couldn’t find a work around with their system or override the order. The worst part is they offered me a discount for my next tour and instead of sending it to me via email they wanted to book it on the spot. When I finally looked at the email, they had just sent me a generic email stating their policy as a 100% cancellation fee, when all I wanted to do is to change the dates. I will be reporting them to the better business bureau. You can see the time stamps in the photos. An honest mistake cost $243