PlanSource Analyst interview questions

I applied online and was contacted by a recruiter within a week for a telephone interview. After the interview, I was told they would let me know in few days if I made it to step 2 (on site interview with hiring manager). They did not contact me for nearly one month! Then I was asked to come to the office to interview with 3 people. The interview went very well and they sold me the idea that I was exactly who they have been looking for. I was told a decision would be made within 1 week and I would hear back regardless. It’s been nearly 3 weeks and I have not heard anything. Zero contact from anyone at Plansource like most reviews. It is unprofessional that interviewers simply don’t keep their word and follow up with interviewees.