Amazon India — Item not delivered on the updated address

Address:

New Delhi, Delhi, 110001

I had ordered for a mobile phone. After ordering the same i updated my delivery address on the very next day. I have made some calls also to your customer care for the updation of my new address and they confirm me that the same has been changed. I have called you on 11th march, 14th march and 15th march for the same. But today when my order get undelivered from the old address then i came to know that my address still not changed and only communication of 11th march is updated in your system and there is no details of call which i made on 14th and 15th march. This was very urgent for me as i was having some commitments to someone. Please also tell me who will compensate me for this.