P.N financial/ WFS financial I paid off my balance in 2009 and now they want me to pay them again!!! Are they kidding!: Skokie , Illinois

We bought a 1998 Dodge Ram and was told that they would work with us through anything, cause I was going through a lot after I had my second child , I found out in 2003 had cancer in my Uterus and had to have emergency surgery. I had insurance but it didn't pay it all. I asked if they could lower the $400.00 a month payment to $ 350.00 a month considering we were going through a tough time. We got the run around and was harrassed and finally, I'd had enough . So I did they only thing I could do , I had to give it back , I took them another month to get it . I tried to make payments, and before I knew it , they were gone . I called the company that took their place and they told me they were under investigation for fraud and stolen vehicles. So I just let it go at that, then years later 2008 we recieved a bill and called them , and what do you know there they were. These guy were the most unprofessional people I have ever dought with, they threatened to take my vehicle, take my home and were persistent and nasty, So my husband got a loan and paid them , they gave us no paid letter ,but I have the letter with the confermation number! Now my husband has to get statements from his bank !!! This company is the worst company ever!!! :( I want this nightmare over !!!! Can anyone help????