NTT DATA Assistant Project Manager interview questions

Interview initially conducted for assistant project manager. The interview process got over within 10 days and HR communicated that I have been selected and even negotiated CTC part. HR sent CAF form to fill and share the same which I did immediately. She said I can expect offer letter in couple of days but there was no response from HR. It's was almost a month I have waiting for offer letter. Whenever called for update I used to get response saying it's under pending for approval. Later on day she called and told that I have been projected to different process so one more round of interview would be conducted. Got a call from manager and I was through with the round. HR called to send my salary slips and relieving letters of all company. After 25 days HR is updating that the project is kept on hold. Worst ever experience in my professional career. HR sucks big time in NTT data