Hot water problem causing huge bill

[Jennifer Whitledge]

Is it fair for me to not have my own hot water heater instead of 3 apts running off same heater that is downstairs in a apr where their is alot of kids and randon people taking showers. My power bill is almost 100 due to this problem. My manager wont do anything other than saying water is included in rent. Isnt hot water electric? I dont know how to rectify this problem and to lower my bill