Capital One interview questions

Applied through career services at my school and then got an interview with a hiring manager on campus. Interview went very well and that overall experience was very pleasant. The interviewer was very polite and overall very pleasant to talk to. A week later I get an email saying I've been accepted to the final round of interviews and that I need to sign up for a date, so I emailed them back immediately with the date I could make it. I don't hear back from them for almost two weeks and after emailing my recruiter back multiple times and calling, it finally takes me emailing the general careers email address to ask them to have the recruiter get back to me. About 4 days before the day that I had requested to interview they finally get back to me saying that they couldn't sign me up for the date I requested, that they forgot to get back to me about it, that there are no other times in which I can interview. I'm okay with not getting a job because of a bad interview or because I just wouldn't be a good fit with a company, but to not even get the chance to get to the final interview because of lack of communication is very frustrating.