Discover interview questions

Due to living out of state, Discover flew me to Chicago/Riverwoods to interview. I had 4 interviews back to back. Everyone was very nice. While I did not get a tour of the campus, it seemed very nice. My last interview went until noon and my return flight home was booked for 2pm by Discover. While I made my flight, this was a very tight window and started feeling anxious about making it during my last interview.

The interview itself was easy, but I never got a call back or an email from them since my interview. I called once to see what had been going on. They said they'll call me back, but they never did. I really wanted this job, but their response timing since the interview is lacking.