Deloitte SI Testing- Quality Assurance interview questions

There are 5 rounds in total. Two technical interview followed by versant then Senior Manager round and final HR. Entire process takes 1 day. I cleared all the round, in HR round after salary and joining date discussion i was told that i will as per response from business they will get back to me in 1 week. It's been 3 weeks now, no response. HR doesn't even replies on mail. Very disappointed with the experience, I travelled from Pune to Hyderabad for the interview. After spending entire day and clearing all rounds i was at least expecting a feedback.