How did I handle an «Undeliverable» case on Amazon marketplace?

Undeliverable

Unfortunately, a problem occurred with your shipment and we no longer expect it to be delivered.
We’re sorry for the inconvenience.
If you have not received your refund within 5 days, please contact us.

2023-08-15--07-08-12

Step 1. 2023-08-15

I waited for 11 days and still have not got the refund.
So I contacted Amazon via the support chat.