Odyssey Audio: Sent amp for service 4 months ago, no amp / no contact back

Hello,

I bought an amp from a store in Seattle, WA that deals in new and used audio gear.  They thought it was an Odyssey Stratos at the time, paid $1000.  Worked fine for a couple years and then one of the channels started popping loudly.  I contacted Odyssey, since they offer a 20 year warranty, and got a reply from Klaus Bunge in August of this year (2015).  He informed me that it wasn't actually an Odyssey amp, but offered to replace the guts for ~$500 and gave me the address to ship it to.  Seemed like a kind and generous offer to me!  The store in Seattle was kind enough to take care of shipping it there and I was pretty happy with the prospect of getting the real deal and emailed to Klaus to ask about the upgrade options offered on the website (http://www.odysseyaudio.com/products-stratos-stereo.html).  It's been 4 months now and I've got nothing. No replies to several emails and phone calls.  The website is still there, so it seems they're still in biz?  Looking around on the web, I don't see complaints about the company.  Thought they were reputable.  Any ideas for what I can do to resolve the situation?