Initially I booked river cruise for August of 2020 and I paid in full on January 2, 2020. Because of Covid they cancelled our cruise. They offered voucher that i redeemed. They cancelled our cruise again. We booked cruise in third time. We supposed to go for the trip on coming August. Just accidently I found that Viking had changed their Terms and Conditions on May 22nd, and they require vaccination. We did not sign under this Terms and Conditions. Vaccination is a person only business and choice. We asked for cancellation and refund. They said "No. Voucher cannot be cashed. You can rebook". No, Viking, I am cancelling because I will not be going for vaccination, and you are proposing to accept this: "You acknowledge that Carrier's COVID-19 Policies and Procedures may or will include... vaccination of guests with documentary proof satisfactory to Viking". I am trying to resolve this since June 4th. We paid $10, 495.00. Viking holds the money and they set up the policy that has no sense for the consumers, but benefits the company. Booking 6081431.