Sarelet — Received an item which was not ordered

I had ordered a silk saree for my mother from your site, I got the delivery today and we opened the packet and found 2 full pants, what is this kind of behaviour Sir, If I had ordered a silk saree I should get the same silk saree which I had seen on the site.
For the same delivery I paid ₹848/- to the delivery person, we were very much angry on you for the same mistake, and also very very upset, kindly make arrangements for the packet to be returned.
The bill on the packet states that it has saree in the package, but when we open the package we found there were two pants in the same,