I’m a property manager and we can’t really help with electric bills any more than we could a cell phone bill. For keeping the apartment at 68 and for the huge rate increase, that bill doesn’t seem so crazy to me- but if she lived on my property, I’d suggest she call National Grid and have them check her meter to make sure all is in order and check her bill to make sure it was an a actual read and not an estimated read. Good luck!