yes, his company is crap..... I wrote a review of KBaudio a while back. sent off a mint condition PPI PC2150 to have the RCA inputs replaced and it came back damaged, scratched up, etc.... very poor service. And yes trying to get ahold of him is very difficult. After weeks of him having my amp and no response I emailed him telling him to just send my amp back unfixed that I would find someone else. Sure enough it came back a couple weeks later, but not in the mint condition it went out in, nor in near as good packing job either.
hope you get your amps back.