Translation of scapegoat in Spanish

We drove to the hotel Rex where we made reservations in advance. However, once there, two American guys told us that they had a voucher from a travel agent and the price was like half of it.
We had a great first impression of the people in Cambodia. We were expecting that people would like to take advantage of us but it wasn't the case at all. Our driver for example was very kind.
The drive to these lagoons was not easy. The jeep did not have air conditioning, so that in the sun it would get extremely hot and in the shade extremely cold. The jeeps were around 15 years old.