MIT interview help

<p>hi guys,
I need your help. I had sent an e-mail to my EC to arrange for an interview. but there was no reply so again after 5 days. i sent him an e-mail. again no reply. So,yesterday (after 12 days) i contacted him through his contact number. he told me that he would sent me a reply through an e-mail in a couple of hours. but till now there isn't any reply. so what shall i do?. shall i call him again? the deadline for Regular action is december 10th. please suggest me what shall i do?</p>