OP, people have set you straight at this point, so I won't pile on. The summary here is that your bill is most likely accurate, so taking it up with the gas company would be a waste of your time.

Is it unfair? That's more of a political question. If you choose, you can certainly take it up with lawmakers, in terms of supporting expansion of LIHEAP-type benefits, gas price capping, or improving rental laws regarding insulation requirements. But that's the level this is currently at.