Amazon.in — product not received after 01 month

Website:

amazon.in

I have purchased a harmonium worth rs. 19500/- vide order no.[protected]dated 18.10.2017 but the seller namely trading dukan had not shipped upto 15 days after that i had made a first complaint on 31st october 2017 but they have not responded to my complaint and did not get any information about my complaint then i had given my 2nd complaint to make the delivery fast but after then when i checked my order status it showed me that the item has been shipped on 07th november 2017 and given me tracking details and estimated delivery date was shown as 16th november 2017 but today is 17th november 2017 not have any idea of my item... When contacted to the dtdc courier as provided by the seller and tracking details was found fake... Now i feeling like cheated by the no.1 shopping site in india
Plz... Show me a way how to deal with d situation