I booked two rooms in a hotel in Paris. But when I paid I didn't know they've charged doubled price for the second room. I didn't know about that until I received a message from my bank. I immediately called customer service but I was put on hold. After being on hold for over an hour I was told there will be no refunds and no cancellation. Then I decided to contact the hotel, but they told they had not been contacted by Trivago at all. They did not know anything about my reservation. Will never use this horrible service again! Thieves just stole my money! But they will not get away with it!