I don't think they take much personal information, especially not as much as would be compromising, and why would giving out the serial number be problematic? It's the only way they can verify a warranty claim, if indeed it's a new unit or falls under the 3 year warranty. The serial can also be transferred to a new person because the warranty extends to the unit, not the owner, so wouldn't be a problem whether it was yours first and then transferred or was someone else's first then transferred to you.
I say contact support, it's gotten to that point. Anything else seems like time-consuming minutiae that will ultimately frustrate you. Add on top of that the possibility that support will ask you for the same things you posted here, making you feel like you're doubling your work could be of further frustration.You paid a lot of money for your Kemper. Let them help.
Hope it works for you, dude.
Well said.