how can I get instructions on how to use Zonotec wall heater?

I have a Zonotec wall mounted electric heater with controls I cant make head or tail of. The manufacturer/importer (Neatheat.com?) appear to be out of business. The instructions don't make sense. It sometimes goes on and off when I want it to, but most times not. Any result is more luck than judgement. Any help would be much appreciated.