You do realise we are arguing about Hell... that doesn't PHYSICALLY exist whether you believe it or not.
Having said that... the first reason you are wrong:
Hell can only get hotter if the surroundings have more heat to give to it. If there are no surroundings, then there is no heat to gain, and so Hell would remain cold.
Another reason you are wrong:
Even if something is getting hotter, it can still be cold. Picture an ice cube, if you would, taken out of the freezer. It is endothermic, and getting hotter, but it is still cold.
A third reason:
Hot and cold are relative terms. A hot body is one with more thermal energy than that that is around it. So even if Hell were incredibly hot, compared to room temperature, if it was still drawing in energy from the surroundings, it would be cooler than the surroundings. Therefore, if you were there, it would feel much colder than everything else.
Your move.
