iFocus Systec interview questions

The interview process had 4 rounds in total so the first round was an ai interview then a resume based interview then there was manager interview round which included dsa and aptitude and then hr round all this was fine ! But the hr team is soooo bad they lack coordination they sent me a selection mail collected all my documents and gave me onboarding details and then told me they can’t give me the offer letter because of less vacancy ! What a bad experience, highly unprofessional