Kolkata Customs — parcel held by customs for more than 3 days

I have my parcel stuck at Kolkata customs since Friday.
I have tried to contact them via contact us page mentioned on thier website.
No one picks up the call.
How am i supposed to talk about shipment
If they dont even are to pick up the call.
Neither do they have any mail id for me to contact.
Its just really frustrating and fultige operation.
Pathetic