If you had signs of fermentation (air lock bubbles, foam ring at the top of the fermenter) then you did not completely destroy your yeast with the heat. If any was left and it did give these signs then you are o.k. The higher temps may lead to off flavors but your yeast worked. It sounds like you did get fermentation since this gravity is far too low to be an original gravity of a kit beer. Don't put too much trust in your hydrometer to tell you when this fermentation is complete. I would give this another week regardless of what the gravity is. If in another week the gravity is still the same, bottle it. If the gravity has fallen more, bottle it.