Upgrade from Schiit Bifrost 2?

I had to provide my original order and serial numbers on one of the forms to verify the unit was covered. As I recall, it's a two step process. I hope this works for you. 

Long time lurker here. My first post. I just want to note my experience with Schiit's customer service. My Bifrost 2 stopped working after several months. No power. I filled out the service form on their site and received an email with an RMA within minutes. The Bifrost arrived at Schiit on a Wednesday and was on its way back to me 2 days later. They replaced the transformer and analog board. This was less than a month ago. As always, YMMV, but I had a very positive experience. If you haven't already, you may want to try again using the form on the 'help & support' page.

At least you received a response. That's a good sign. You'll need to pay to ship; they'll take care of return shipping. Even if you've soured on the brand at least you'd be able to sell a working unit.