Return of AC200P

I just recently sent my power station back for warranty issues.
I had Fed Ex package it up and send it to the address on the shipping label that was sent to me, somewhere in Industry California.
It had reached its destination in 4 days.
The person I was corresponding with via email had told me a new one would be shipped right away.
When I emailed again that same person told me that it could take a while depending on the warehouse.
Is this a normal response?
A lot of money is at stake, making me a bit nervous.