Impossible to get in contact with themI booked a cave tour in Portugal, payed in advance, but the cave was unfortunately closed due to local authorities restrictions. I contacted the seller and he told me to cancel the booking that he would approve the refund. Passed 10 business day I didn't get the refund and the seller said there is nothing he can do because he can't contact TripAdvisor... neither do I because the it is impossible to find a way to contact them and solve this issue.Update: It is not a mistake! I booked the cave tour through Tripadvisor platform. It was not a mistake! I cannot contact customer support! I will never use TripAdvisor again.