Amazon India — non delivery of the product in spite of continuous contact from customer care.

I ordered my huggies wonder pants and it was to be delivered on or before 11sept but inspite of successful order the product not delivered and they asked for additional address which i provided to customer care and he assured for its delivery on next day. I also gave to contact numbers but inspite they didn't delivered and instead said courier boy called you but call didn't connected. I want to acknowledge you previously i got several products delivered at the same address as i am regular customer of amazon.