AmeriGas Propane tank rental fee. Fredericksburg Virginia

I have a 325 gallon propane tank burried on my property.  It was here when I purchased the home.  Which apparently locked me into a lease that I never signed.  If i do not use a certain ammount of gas every year then I get charged with a tank rental fee, which increases every year.  The tank was just filled with 120 gallons of propane that cost me $575 which to me is outrageous.  Then I recieve a second bill for $175 for a tank rental.  But if I used more fuel to heat my home I would not be charged the rental fee.  So I am being charged  rent on something that this company has not done anything to in 27 years.  The rent keeps going up and they can charge what ever they want to make money.  I told them to come take the tank because I was not paying the fee.  I was informed that I would first have to empty the tank then I was told that there would be an excavation fee for the removal of the tank.  So no matter what I do, I owe this company money.  I told the lady on the phone that  I am sure I am not the first person to call with these complaints that she has probably had thousands of calls like this one and her response was "Yes sir I have".   I asked how does it feel to work for a large corporation that is just screwing people and if she had a sole "Well that is just how business is done".   I have been President of my homeowners association for the last 14 years.  Our community is only about 40% developed, any new construction that happens here I will highly recommend that people do not use Amerigas, I will make it my duty to send out in every membership email to inform people of the pathetic business practices at AmeriGas.