Fedex — Product not delivered and customer care not helping

I am from bokaro steel city jharkhand.
I have ordered a voltas 0.8 ton window ac on 24 may 2020 from amazon india. I have amount of rs. 20, 990/- via my credit card in emi mode of 24 months. The expected date of delivery is 01/june/2020. The seller of this ac is named as t. T. Enterprise on amazon india who was residents of new delhi the seller shipped it on 25 may 2020 and shared the tracking number which is[protected] after two days later 27 may 2020 courier company named as fedex recieved the shipment at 3:21 pm on 27 may 2020 on the same day at 8:22 pm shipment has left the courier facility new delhi on 27 may 2020 after this on 28 may 2020 the fedex courier facility of gurgaon india received the shipment on 28 may 2020 but after this they are not scanning the shipment and not updating the status of my shipment there is no record of my shipment where did it go where it is no one knows the expected date of delivery date given by fedex is 02/june/2020 and today is 02/june/2020 still i am waiting...
I have raised complaint to amazon india and amazon india seller tt enterprise and fedex as well but no one responded they only keep saying we are on it and it will be delivered and keep extending the delivery date now it's 05/june/2020 amazon india customer care aslo said that thier large appliances team will contact me in 48hrs but no one contacted me... And whenever i call fedex india customer care they always keep me hold for about 20 mins and after this call was automatically disconnected no one responing...

I request you to please take action against them they are harrassing me too much please do something please.
Thank you.