Viator is a total scam. DO NOT USE VIATOR. I tried to book a sailing excursion in Madeira Portugal and only received automatic emails asking me to rate my experience. I was charged for the excursion and tried to confirm and make adjustments to my booking and never got a actual response, only got more automatic emails to review my experience. So I tried to contact the vendor directly by email, Viators messenger, Whatsapp, phone, and text, and never received a response from the Sailboat or Viator. When I went to the vendors address and meeting spot, I could not find any evidence of the company. When I added this same review to Viators website, it was rejected bc their "guidelines" prohibit posting negative responses so that the public has no way of finding out that they are a SCAM. Apparently only EU citizens have the right to appeal that they will not post negative reviews. DO NOT USE VIATOR. IT IS A SCAM. Hopefully the credit card will refund