^^^ on the usps.com website. You can have them email the details of the package that was sent to you.
Enter in the tracking number and then hit "go"
Then it will give you an update...
below it... it shows:
Track & Confirm by email Get current event information or updates for your item sent to you or others by email. Click on the Go button again.
Enter in your first and last name, email address and also click on the two boxes above where you entered your name, etc.
Track & Confirm by email (Select at least one option): Email all activity to-date.

Track and Confirm by email (Select at least one option Email all activity to-date.
Email all future activity.

Track and Confirm by email (Select at least one option Email all future activity.
In a short period of time, they will send you an email ... showing where and when and if the package was sent etc.
BTW- did you heard from your Seller????