RapidAdvance Credit Risk Analyst interview questions

First, there was a phone interview, the HR just went over my resume and told me more about the position and the company. After I passed this one (about a week after the first round), there was a technical phone interview with the manager of the group. The interviewer asked me some statistics questions and questions about Excel/SQL. We also talked about more details about my experience and the interviewer told me more about the everyday jobs and the risk-analysis group. I was informed by the HR on the following Monday that they would like to invite me for an on-site interview. I was really happy because I was interested in this position, I thought I am a great fit, and I did enjoy the last round interview with the manager. Now here is the part I do not understand: the next day I sent an email to ask for an update, and the HR told me that the interview arrangement would not just take one day and I should wait (I have to admit that I was too hurry at that time). I waited for another two weeks, without getting any update, and I sent another email. This time I got no response. I sent another email on the following week, no response. That was about at the end of February. I decided to send an email to the HR director, the director said that she would check it for me, and... no more response, even if I sent emails to ask for updates (once per two weeks, I believe that was not too disturbing). Today is April 2nd; I do not have any update/information about the on-site interview. I feel that I was not respected: If you think I am unqualified, just tell me so, do not tell me that you would like to interview me and then ignore me. And if you invite me for an interview, I believe at least I deserve an email if things change. I was (and I am) very serious about this opportunity but turns out that this was just a waste of time.