Klarna interview questions

I was applied online for the Analyst job in Berlin. They sent me an online test which was easy to pass. First interview is with HR. HR was one of the most competent I have ever interviewed. I was asked typical motivational questions related to Klarna and fintech. HR could answer the technical questions I asked as well. I have been told there would be an another technical round, and if that would be successful I will be invited to Berlin to meet the team. Second round was with a team lead in analytics department. It was a business case of the comparison of the effectiveness of two marketing projects. It lasted around 1 hour. I got an e-mail from Klarna after the second interview called "Relocation Support". They asked me to send bunch of documents (residence permit, passport, diploma) to assess the ease of visa application and relocation support. Then I heard nothing for a month. I tried to reach them from every possible ways I could. I tried many phone numbers, went to their office at Amsterdam, sent out e-mails etc. Then I sent an e-mail to the team lead that I had the interview. He replied me that the HR went on an holiday and asked me for another interview. We did the second interview and I could not pass. They sent me an e-mail withouth any explanation that I failed. It was by far the most disrespectful interview experience I have ever had. Asking for the relocation support and going black for a month, then asking for another interview and not giving any type of explanation was an extremely bad type of behavior on their side.