If you’re not paying for electric heat or electric hot water, I would see about getting someone to look into whether things are hooked up correctly. It’s not out of the ordinary for tenants to be paying for common areas or other zones outside of their apartment, whether intended (nefarious) or not. Additionally, I had a high bill in my common area for a couple of years. Eventually my front porch light fixture went completely dead. Since replacing that fixture, my bill went back down to the original $$ each month, so clearly the issue with that fixture was sapping power.

But like others said, first step is changing provider. I changed to town square after the shock of seeing my last months bill. Rate went from 23 cents to 10.5 cents