We booked a tour of the Roman Colosseum, Forum and Palatine Hill through Viator. We showed up for the tour and were told it was cancelled because the tour guide didn’t show up. We were given two tickets worth 18 euros each. We paid nearly $220 for this tour. We did receive a $98 refund, which seems inadequate. The tour company refused to give us an additional refund, partly because of Viator’s commission. When I contacted Viator they continually send me to the tour operator, even though I paid them. When I asked them about keeping the full commission, they will not respond. So we ended up paying 3 times the amount we would have paid if we would have booked it directly with the colosseum. Very disappointed.