Product: Debt collection

I am paying monthly installments on 3 fines imposed by XXXX XXXX XXXX Case # XXXX, XXXX, XXXX. I had a very difficult time finding gainful employment after being convicted of a XXXX in XXXX which continued for the rest of my life right up until now. Even though a college graduate with years of industrial experience I was forced to work part time minimum wage jobs. It was not until XXXX XXXX that I was able to start paying on my fine. I sent {$10.00} U.S. Postal money orders to the XXXX XXXX clerk beginning XXXX XXXX then 2 more for XXXX and XXXX. 
I received a letter from XXXX XXXX XXXX dated XX/XX/XXXX address XXXX XXXX XXXX XXXX, XXXX XXXX, FL XXXX It had the 3 fines with the case # assigned and the amount owed for each fine. I still have the letter. The total of all 3 fines was {$5500.00}. I started sending XXXX money orders to XXXX on a monthly basis, I have all the receipts. For a while I was receiving monthly statements. The balance kept growing the total keep getting larger, even though I was making regular monthly payments. Even the 3 payments sent to XXXX XXXX clerk had not come off the balance. I was told the reason was a finance charge had been applied the reason why the balance was still increasing. 
Around XX/XX/XXXX apparantly the debt was taken over by a company called Credit Collection XXXX, the XX/XX/XXXX money order for {$10.00} was sent to them. The only address I have for them is XXXX XXXX XXXX XXXX XXXX, IL XXXX. The sent 4 statements in XXXX XXXX, XXXX, XXXX, and XXXX. It was clear from the balance they were not applying the payments fairly. 
My last written correspondence from them was a statement dated XX/XX/XXXX. Showing a total of owed at this time of {$5300.00} We had a conversation by phone before this final letter was sent. I was told the finance charge would continue unless I made automatic payments from my checking account. However on their website the balance shown still contains the finance charge. An employee had written on the final letter by hand XXXX x XXXX Interest stopped : Balance {$5100.00} On the phone she said they would mail monthly statements if I requested which I did right then on the phone with her. But they have never been sent. The web site continues to show an untrue balance which does NOT correlate with what she wrote by hand on that final letter. She told me over the phone that the True balance would never be shown until it was paid off in full. But she had told me on the phone that the only way the finance charge would stop is to make automatic payments which I gave her my banking information at that time. This had no effect on the balance that continues to be shown on their website. 
I feel this company is operating dishonestly, not providing any written communication since the final XX/XX/XXXX statement. I do not trust them to ever pay the debt in full no matter how many payments I send them. I don't see how they can legally operate this way. Keeping two sets of records or books and only allowing the payer to see the one balance with the financial fees included. When the debt transferred from XXXX to Credit Collection Partners I was not credited for many of my payments, including the first 3 that were sent directly to the XXXX XXXX clerk in XXXX. I have paid many hundreds of dollars that were never recognized or recorded and never shown on any statements what few were sent.