Amazon India — Not returning the product

Address:	Bangalore, Karnataka, 560055
Website:	www.amazon.in

Hi sir/madam,

I purchased product "attache 1021r climate proof 75ltrs blue & grey rucksack"
From amazon india. After purchasing the product i see that it will deliver after the date at which i needed so 10 minutes after purchasing the product i called to amazon customer care and ask them to cancel the product, they confirmed that they will cancel the product.
Next day morning i got call from amazon seller to process the product, i told them not to process the product as i don't need the product and to process the refund.
Even after this product delivered to my address and when my family refused
To take the product he said you need to apply for return then we will take it back... Now after that still it is one month no body is picking the product and amazon is saying i need to self return the product.

Now the point is :-

1. Why amazon did not cancel the product when i called just after 10 minutes of order placing and even order was not confirmed by seller.
2. Why amazon seller process the order even when i said i don't need it.
3. Why even deliver guy did'nt listen us.
4.in the end after doing all mistakes by amazon, why costumer should go and do the self retun.

Please help me because now when i am calling them they are not listtening me.