The electricity company will not be scamming as they are regulated. All charges will have been agreed by the regulator.
It may seem like they are scamming but they will not be!
As I have suggested in another post take back the POWER in the situation by regularly reading your meter and keeping a not of how much you have used. Watch for fluctations at Christmas and other bank holidays. If you cant read the meter yourself perhaps a friend could!
All power companies have leaflets that explain how the power is used ,calculated etc and a better understanding of that will enable you to make choices about how you use your supply. Some leaflets contain suggestions about lowering your use.
Hope this helps