Glass Systems Group interview questions

Initially emailed by HR as previously interviewed and left good impression, but was not offered position. Had initially interview and then put forward for additional meeting with Senior management. After this interview, i chased for update some days later, as i was given impression they needed to find applicant quickly, and was told that i was unsuccessful. I followed this up to try and get more feedback to assist my interview skills and not heard back since. To say unprofessional is an understatement