Staples Disposables interview questions

Went through the process via the Agency. The entire process took around 4 weeks and had 2 interviews. The first interview was with the operations manager and the HR which asked competency based questions for around 1hr and started my interview 20minutes later as they were 'busy'. After 5 days I've been informed by the agency they would like to take me to the 2nd phase of the interview which was a power point presentation. I worked for the presentation for around 12hrs, did alot of research and made sure it's very professional and nicely structured. On the 2nd week I presented the PPT with 4 different people(considering that I've been told the interviewers will be the same 2 people as in the first one). Waited 2 weeks for the answer which was: 'not enough experience in a manufacturing enviroment' - considering that on my CV they knew from the very start that my experience was leading a team in a warehouse. Disappointing experience and lack of professionalism. My advice for you as a business would be to feedback sincerely so that the applicant would know how they did ( Because that's the purpose of a feedback,no? Improvement...) or not feedback AT ALL.