Interview was having 3 rounds, 2 technical followed by HR round. I have cleared both the technical rounds. HR also agreed on my expectations, and I was told offer letter will be released within 2 days. After a week, I was waiting for offer. I was keep following up with HR, every time response was like 'we are waiting for few approvals, once we get we will released your offer". Same response was there for more than a month. At last they told "you need to reapply and go through all the processes".