India Post — wrong status update

Address:

785669

Consignment number #AW[protected]IN

As reported by the SPM, Dankuni Coal Complex PO, the article bearing no AW[protected]IN is delivered on 08/06/2018.
Still status update "
Item Bagged for Dankuni Coal Complex S.O"

It's a Amazon prepaid return product ! They are not refunding my amount because of product being not delivered according to them !
Please update my product as "DELIVERED"

It's been approx 1 month. Else I will not get my refund amount !