Xiaomi India — main products mi band 4 missing in courier box

Dear,
I ordered mi band 4 and blue strap with order id [protected].
But there is no mi band 4 in box.
Complain number - woin[protected]
Only blue strap and charger received..
I did not received mi band 4 in courier parcel as per order.
Also photo attached.
Now mi india refused to deliver mi band 4. They told case is closed without proper investigation.