Hi,
I've dealt with EJ of Wyred 4 Sound and they were great when I had a problem with my mono block ampzilla 2000's. I shipped one mono block to the USA and they really looked after me on the repair price. A previous technician damaged them and they were also out of warranty. Btw I was so happy with EJ's handling of the matter I've just ordered a Ambrosia preamplifier and will have it shipped to Australia in the next couple of weeks.
I'd take them back to the experts.
Cheers Rod