Workhuman Outside Sales Representative interview questions

Initial interview process was not bad, but company lacks respect for candidates. I was asked to put together a presentation and the company would fly me out to Portland for an onsite interview. The day before my trip I received a call informing me that the company is going in another direction? I spent a whole week preparing for the day and with one call was told a "No." The unprofessional part was when I asked the recruiter for feedback and she completely ignored the request and told me to have a great day. If I was not a good fit, then tell me on our first, second, third call or even on my first onsite interview? Pulling the plug a day before when a candidate spent hours preparing is simply unprofessional.