KPMG Analyst interview questions

Kpmg Germany, Frankfurt. The worst experience ever. The interview passed smoothly, got a job offer via email the day after. But after that, things got complicated. I was offered to stay there so to get a work permit, the hr were working hard on that issue. I got an offer, sallary, benefits, everything, was asked to send them all the necessary documents, diploma, recommendations, I translated all of them.. and month and a half later, I was told that i had to go threw another interview, the partner was not informed about my future employment. Such unprofessional company, management, everything...