Booking.com Customer Service Executive interview questions

Disrespectful interview process. After passing the language test online, I was invited to an interview. When the time for the interview came, the first thing that the recruiter told me was that the position had already been filled and they wouldn't be conducting an interview, but they would take my details down for future opportunities. I had spent a great deal of time preparing for the interview and it wouldn't have been difficult for them to send an email or voicemail to let me know in advance that the position had already been filled. I found it extremely disrespectful. There is no need to be so blasé about how you treat people. I don't think they stopped for one minute to think about the time investment I had made for that interview. If that is how they treat interviewees then I would be very wary of how they treat their employees.