Blue Dart Express — non delivery of amazon consignment

Address:

Kollam, Kerala, 691506

Hello
I am arun raj a k and i have been doing online shopping for quite sometime.
Every thing was fine until my consignments were held up with blue dart, kottarakkara in kollam district of kerala, for the reason that they are not having service in my area. Since i have brought the items through amazon and they have promised me of delivery at my address. But blue dart is asking me to collect the items from their office. At the same time i have no issues with other courier agencies as they are delivering at my address. I have raised this complaint with amazon many times but they have not given me a solution yet. I even requested them not to choose blue dart for delivery of my items, and they have informed me that they are helpless. So i would like to know whether a courier agency as a whole has such a service area policy or it is regional phenomenon. And if they have such a policy i have no issues but they shouldn't accept my shipment at the first place, as i am loosing my time. Kindly revert to me at the earliest.
Thanking you
Have a gud year ahead