What is the status of Deltec Precision Audio (DPA)?

Does anyone (perhaps in Britain) know what is going on with Deltic Precision Audio and its CEO/designer Adrian Walker?  Their Facebook page continues to have updates, but I have tried to contact them/him numerous times without any response lately.  At his advice, I sent back an MA1 amplifier from the USA for repair, paid for the repair, and never got it back -- unbelievable!  My DPA system is lacking one channel, and it looks like it always will.