Nationwide Marketing Leadership Rotation Program interview questions

My 1st Interview at University and 2nd Interview at Nationwide in Columbus, Ohio. The initial interview was laid back. Following the first interview, I did not receive a call back for two months. After a couple months, they finally called back and invited me to interview at their corporate office. There were 3 interviews and it took the whole day and overall it went well. Following this interview, they NEVER called back. Not even a polite acknowledgement that I did not have an offer. This is an embarrassment for such a large company. If a candidate is willing to dedicate several hours toward your interview process, it is pathetic that they will not get back to their candidates.