Gameloft interview questions

My interview process consisted of three stages: a conversation with HR, completing a test task, and an interview with some team members whom I (as I understood) would be working with. The test task was quite extensive – they were definitely looking for someone with solid knowledge and considerable work experience. I went through all three stages, and they took a very long time to provide a final response – nearly two weeks of waiting. Unfortunately, I did not receive an offer.

After passing the test for Environment Artist, they invited me to interview, I had to pay for the flight to Barcelona and hotel, but then the interview was a joke, the interviewer was not focusing on knowing about me, my skills, or my decisions for the test, and he was talking about him and his past experience.. Then at the end he told me that I did more than it was needed for the test.. Then why did they call me for the interview?