Blue Dart Express — shipment not delivered at pincode mentioned in order

Address:

Kottayam, Kerala, 686564

I have ordered in mi website with delivery location pincode. At time of ordering site shown that delivery is available in my location with pincode 686564.
Courier is handled by blue dart and can see update in tracking site with waybill [protected] with status undelivered shipment held at location. I got call from blue dart local office saying they have too many parcels to deliver and home delivery not possible. If customer has to collect from courier office (Which is different pin code) why its not mentioned at time of ordering or informed by courier to xiomi mi. I have ordered earlier in this portal and received home delivery in pin code 686564. Please help on this.