Don't use Viator/ Trip Advisor they don't investigate refund requests. I had proof with witnesses including my Uber driver and pictures that I could have taken a swamp your. I booked a tour on Viator/Trip Advisor website based on the “great reviews”. I arrived 1 minute late due to heavy rain to my Jean Lafiatte Swamp Tour in NOLA and was told by the rude staff that the boat already left. As I was leaving in my Uber we saw the boat full of people waiting out the rain. I took pictures for proof and will report this to TravelAdviser but they refused to view evidence or speak with anyone. They are only concerned about the vendor and not customers.