Enercare Home Services

I am trying for the last 10 years to cancel my water-heater rental to be able to install an tankless and more energy efficient unit. The unit I have is 18 years old and was charged $345 for buyout cost. The rental cost increased from $24 to $42 within the last 18 years without any justification. Also, Enercare did not want to take back the unit and was told to dispose of it myself instead of them recycle the unit.