EnerbankUSA Not statements from bank for a loan for years , Internet

IN June of 2010 I applied and got a loan for 5,000 dollars 6 months same as cash.  I tried to pay this loan off and may have. I was moving and needed some money for the repairs from a collapsed wall. I got a initial payment book but was paying like a thousand a month to pay it off in full before the 6 months. I thought that I was paid in full actually waiting for a check for over payment. Over 2 years no statement from them then I get a interest bill for like 70 dollars. I paid that.  Thinking that was all. Now I get phone call all the time saying I owe them like 1,000 dollars. Still to this day I have yet to see a statement. They even call my parents neighbors over this.   I am also concerned about my credit score which has been real good but I am sure it is not now.  I requested a statement the last couple of payments so I knew that we were all paid in full. No answer.

I would love to file a unfair lending practice. I see that this is common for this bank. If i was not paid in full it would have been long ago before it got to collections. The collections agency is also a part of the bank. It seems that this was done to hit me with interest and penalties. I got no statement only my checkbook and I thought we were paind in full still do. They will not produce a statement of what I paid or when.  What should I do ?