Hy Arjun, 

Thanks for your question, I would like to tell you that there are thousand of people waiting with the same question why Qatar Airways is not responding to their new selected candidates or even the interview process are stuck. Sometimes Qatar airways take time to reply and process your application so all I can say is just wait and see what will happen. One thing is sure that if you have received the offer letter you are selected and you will be there one day.