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.

Did you have positive results with your warranty?

I’m asking for warranty on my AC200P and they asked me to ship it to “KAYO” in Plano TX at my own expense, no shipping label, and stated that if it’s damaged in shipping it will void the warranty.

FedEx said that they cannot package it or accept it from me because of the size of the battery has liability risks. They referred me to a qualified 49CFR hazmat shipper, and the cost will be $440 for packing and shipping.