Causecode Technologies Nodejs Developer interview questions

They gave me the task to complete by sitting in their office. I had complete it, even the code review happen by the two people. And then he assure me by saying he is going out of Pune and he is coming back next week and when he will be back we will do further process. Two weeks pass away I was waiting for the call from HR. Even I myself called them multiply times HR didn't reply my call. I sent an email saying even the feedback is positive or negative please tell me with reason so I can improve myself for next interview. But I neither get reply on call nor on email.