Reliance Home Comfort

This is absolutely the worst company ever. I was entered into contract automatically by buying the house with the rental heater. They billed me and made the first bill due before their welcome package is mailed to me. The welcome package says if you pay your first bill, you agree to enter into contract with reliance. I didn't know this so I paid my first bill to avoid a late fee and I entered into this ridiculous mess. First, they messed up my name and it took me multiple calls to fix it even though they promised me to fix it on the first call. Second, I wanted to cancel the water heater and they would charge me $450+TAX for reliance to pick up their water heater. If I buy out this 7 years old water heater, it's $1200+TAX. A brand new water heater of the exact same type and size costs $899 in Lowes. By paying $80, I get 6 years of warranty so I don't have to pay anything to get it fixed for 6 years. Renting from reliance for 6 years costs $2574!!! Not to mention they raise the rental fees every year. I decided to return the water heater to their branch for no charge. After I returned it, they still bill me and gave me a late fee even though I am not renting it. I called them twice trying to get this resolved and it still hasn't been resolved. I am just worried about my credit history for the late payment. Why does it take so much work to get rid of this water heater. Even if I got rid of it, they still charge me.