India Post — while tracking shows item delivered but its been more than 2 weeks and yet the items is not received by amazon sellers

Address:	Gurgaon, Haryana, 122503
Website:	Amazon or india post

I bought a smartphone in amazon due to defect i had to return they asked me to return through india post i also returned through post with tracking details when checked it shows item delivered but amazon customer says the item is not delivered yet. There is delay in my refund i have also submitted a complaint: [protected] consignment:el[protected]in i have also called pataudi postal office regarding this issue they also said the same that it is delivered but item not received by amazon sellers i have attached the documents below. Plz take necessary action against this. Until the product reaches destination i cannot get my refund. So kindly do the necessary
Rajesh rajendran
Chinchu bhavan
Kaithapathal colony
Vagamon (Po)
Idukki (Dist)
685503
Kerala
Mob:[protected]
Email:rajeshvgmn1995. [protected]@gmail.com