Bronto Software Digital Designer interview questions

Interview process was lengthy 6 stages - the whole process took about 3 months. First started with a phone call from a recruiter followed by a call with an individual from the Professional Services team. After this you came in for a "Meet & Greet". Once this went well was asked to do a project & present it to the design team. After the presentation I was scheduled to have an interview with the head of Professional Services, but after my presentation the following interview with this individual was canceled because she was "really busy". They reassured me that we would reschedule this interview and that it could be possible to do this by phone. Needless to say, I have heard nothing from Bronto since the final stage of the interview not even an email saying they decided to choose another candidate. It's quite unprofessional to expect someone to spend this much time on the interview process and receive no letter or follow up. It seemed like a great place to work, but communication is not the best practice at this company.