Commerzbank Analyst interview questions

The interview process is weird. I started phone interviews with hiring manager first, then with the HR. But HR missed the interview time and didn't contact me after. So I sent an email to follow up and reschedule the interview time. This time, HR still didn't call me, I sent email to her again. She never responded. This is super unprofessional. If the company/HR didn't respect candidates' time, I believe this is not the company that I'm willing to work for.

smooth interview, the manager are will to explain anything. 3 people are interviewing. a lot of the question are technique which i can't solve, and they are helping me. around 1 and half hour interview