Update: Never got an email that it was shipped but my adapter was delivered, by FedEx, yesterday with a shipping date of Dec. 5th. It came from Dearborn.
I had a similar experience, last week, from Beach Ford Mobile Service in Myrtle Beach, SC. They came to my house in North Myrtle Beach and did the same updates. He didn't connect to the 12 volt battery, he plugged my car into my Juicebox which unknowingly caused the update to fail several times...
I see yours is from Eddie Motorsports but I found a similar one for about $15 less. I wonder how they compare, qualitywise.
https://www.organizedobie.com/ez-charge-battery-charging-units.html
I experienced this volume anomaly myself on a recent trip. My wife Googled it, since I was driving and found several instances of it with various solutions. When I tried to turn up the radio volume I noticed that above the dial it displayed the words Prompt Volume which clued me into what was...
As little as I use it even the $600 price for 3 more years is more than I can justify. Certainly not worth $75 a month in my case. Only way I would use it would be on a per-trip basis.