Amazon India — wrong canon camera sent by amazon

Address:

110030

On 9th october i purchased several product from amazon.in.
One of them was canon eos 800d body, but i received canon eos 1300d body.
I escalated this issue to amazon and mail them just after received and open order. I called him daily basis, but they were calling me investigating team is working on it.
First call i received on 10th oct i explained everything to him. After which on daily basis i called to concern team to amazon team, they were telling me always my team will call you.
But today when i called to amazon they are calling investigation team found that you received right item.
I surprised that without calling me how they come to this conclusion.
I didnot understand this mechanism.
But now they refused to refund or return the item. They come to this conclusion without calling me.