Hola Audio Springs DAC repair

I purchased this DAC a few months ago.  Finally unboxed it and hooked it up.  It has a problem.  The sound coming out of my speakers is ear splitting loud even with the volume on the preamp turned low.  My other dac works just fine.  I have contacted Holo Audio via email twice but got no response.  Incredible!

I have no problems shipping it.  I live in southern Illinois.  I am looking for an excellent repair shop that knows their stuff on days.

Thanks.