I did not like the property and I was afraid to stay there

It was in an attic storage area with broken washing machines and other unknown items. The walls and floors needed repair or paint. I didn’t want to use the bathroom/shower. I was afraid to stay. The pictures on booking.com show only the bed, not the room, and a picture of the outside of the building. I would not stay and that has never happened to me before. I called them and he told me to leave the key and he would not return my money