Wow, that is harsh, especially as you have been trying to cut down.
I can not help with your query re: you paying for others.
However, I just thought I would post as my energy bills have gone right up this year to. We're with Southern Electric.
Our combined gas & electric has increased by almost 60%.
Can you try googling "average annual kw consumption" or something to see if 50,000 is normal?
Hope someone else can help you more.
Brisco.