We were so looking forward to the Gangsters and Ghosts tour. Unfortunately it got too cold for the walking tour, when I tried to cancel the day before, we called the phone number. It was a recording, telling us to go to the website, when we tried multiple times, the website came up invalid. Not only do I expect a full refund, you should change the way to contact to cancel the tour. It feels as if Viator is running a scam.