Pioneer Credit Recovery Suspend Drivers license Lake City Florida

Trying to collect money from a fine back in 1997 (14 years ago). I called them because I kept getting letters from them and wanted them to prove who I was, didn't want to give my personal information over the phone to someone that I didn't know. When I asked them to prove to me who I was the got really rude and started yelling and saying I will just have your Drivers License suspended if you don't pay us NOW!! So I went online to the clerk of the court and it couldn't find my case#.. I am not going to pay Pioneer until I get it straightened out with the clerk of the court. I made payment arrangements because they had me so scared that my license would be suspended, my job requirs a lot of driving.