BDO Project Manager interview questions

I was contacted via an agency for the role. I had two interviews scheduled, everything went smoothly initially resulting in positive feedback and they mentioned they might soon come back with an offer. Then they went completely silent and upon asking feedback they said they had a hiring freeze for a lot of roles. In a few weeks they contacted me again for a role, which they said did not have a hiring freeze and wanted me to take the interview for another department. Interview was scheduled again, 5 mins before the interview time they contacted mentioning the interview was cancelled since they hired an internal candidate. This experience with BDO has been really unprofessional, completely wasting candidates time, which also makes you think of the professional conduct of the company.

Hr interview, 2 professional interviews, group dynamics, Adam milo test. I was an intern there so that was the process. At the end partner interview which was more personal than professional