Blue Dart Express — undeliverable of amazon product

Address:

Kurnool, Andhra Pradesh, 518501

I received message that my amazon is to be delivered on 31-08-17 in the morning.
And at night i received message that product was undelivered because o[censored]navailability of customer but in fact i didnot receive any call from ur courier service that product is to be delivered then how ll u guys say that customer was unavailable. This is disappointing and disgusting dont blame customer, first improve ur services. Now i dont know ll that product be delivered r not for which the amount is paid along with delivery charges.