Rio Tinto Graduate Controls Engineer interview questions

I Interviewed at Rio Tinto Boron in Feb 2020 and had got selected for the onsite interview , When the dates for my onsite interview was nearing , the position went on a hiring freeze . The recruiter back then was very good and kept me updated at each step of the interivew. Sometime mid sept, the recruiter emailed me that the position has been cancelled but the same position is advertised as something else and if i am available for the interview, They had me go through the same interview process again and rejected me in the round before the onsite interview. The new recruiter had also ghosted me. The interview questions were also same as last time and i had answered it even better than last time, This is very unfair and unprofessional