All that work for nothing

So a couple weeks ago I got the wiring done for a 220V heater that someone bought on ebay. I ran lots of cord and made sure it was nice, neat, and out of sight. I was really excited about having heat because I usually freeze out there all winter. Well, we plugged it in and it did nothing. So I checked all my connections and still nothing. So we plugged the heater directly into the electric box, still nothing. We took the heater in to have it tested and it turns out that it operates on 600V which is really weird. So I did all that work for nothing. At least the wiring looks good and no one got shocked. I guess it will be a long, cold, winter for me.