BD R and D Engineer interview questions

After four rounds of interviews, including an on-site panel, it has now been two months without any update. I reached out to the recruiter three times and never received a response. This has been the most unprofessional interview process I’ve experienced.

I applied for R & D position through online. After few weeks i got selected for first round interview with hiring manager which was 30 mins and later i got mail that i moved to next round. Interview was 2 hrs . its a type of technical and behavioral round. Interview went well they asked me to write some queries and i did. After final round there is no response from recruiter(BOT). its been so many days but no update from their end. Atleast they need to provide an update . Finally I got ghosted.