Amazon India — Order not delivered after 15 Days

Address:

Bangalore

ORDER #[protected] with 3 Products not delivered.
Amount - Rs. 577/-
Order date 9th Nov.
Above order shows Delivered on 11th Nov at my office address. I called customer care same day, I was informed that there is been some mistake wait for 24 hrs for delivery to happen.
Next day they said they will investigate & call me back after 2 days.
After not receiving any call after 5 day I call back .I called again they said they will again take investigation request.
Finally after 13 days they said product was delivered on given address.
When ask for Delivery Proof they denied giving it.

Attach is chat conversation wherein amazon ignoring the Proof of delivery request. They don't even have escalation matrix.

Resolution - I will need delivery proof or Refund the said amount. Delivery proof can guide to whom the product was delivered, Our office security does not accept any parcel.