India Post — India Post package delivered to wrong address

I sent a courier to my sister in Telangana on 20 November 2021 via India Post but she hasn't got the courier yet and the tracking number is showing that the item has been delivered.

I wrote 100% correct address and still she didn't get the product. Also on 23 November it showed two times that the item not delivered since the door was locked but my sister was at home all that time period. Neither any delivery boy came nor anyone phone called.
I didn't expect such a mishap from India Post.
Highly disappointed from India Post. Don't know whether my sister will get that courier ever or not. They took so much of time even when it was speed Post and didn't even deliver the product.
If they don't know the addresses then what are they doing in the name of delivery.