The delivery system of most courier companies are restricted to the Tier1 and Tier 2 cities with very few courier companies going towards Tier 3 cities. Delivery service of Tier 1 and Tier 2 cities are good but Tier 3 city has very average service. From last 3-4 years the delivery service has drastically fallen in India, it may be because of heavy volume of shipments.
It could be that or the fact that they are using third party logistics.