Start with the order page. It shows the courier, the tracking number, when it was posted, and anything already raised on the order.
Step 1: Open the order and follow the tracking link.
Step 2: If tracking has not moved for several days, or shows a problem, raise a support ticket from the order page.
Step 3: If a refund option is available and fits your situation, use it rather than negotiating privately with the seller.
Before you assume it is lost
- India Post tracking can lag by a day or two, especially to smaller PIN codes
- Check whether anyone else at your address accepted the parcel
- Check the address on the order is the one you meant to use
Do not mark the order Received to "help the seller out" while you wait. That releases the payment and leaves you with nothing to fall back on.
Raise the issue from the order page, not by email. Support can then see the payment, the tracking, and the seller's side together.