STUDENT VISA PROCESSING TIME

I have applied for a programme in centinneal college under SPP and my application was accepted. I have then applied for my VISA at the VFS in Ahmedabad. I recieved a letter from the embassy to undergo medicals on 23rd of December. My medicals were done on 24th December and Passport was submitted the same day at VFS. I haven't heard anything after that. My programme starts at Centinneal on 11th JAN and the offer expires 18th JAN. So i have to be in college last by 18th JAN.

What should be my course of action. I called VFS and they say its in CHC and they have no control on it. I have sent an email to the New Delhi CHC today and waiting for a response. What would be last date by which they will issue the VISA. I mean how long before the course starts or expires.

I am not sure what to do now. Please advise