JD Byrider CNAC rip off, scam artist Greensboro North Carolina

I got a car from JD Byrider last year, however my job changed outir paydates and they told me to provide all these documents proving that to them so they could go into the system and make the corrections on my file. I have been going back and forth wikth them since october of last year. In October of 2016 they had me sign a paper saying the investingation was complete and since the company changed my paydates the system would reflect those date. My payments are due twice a month. I am never late I always pay 2-3 days prior to the date I sguned off on, however they report late on my credit. when its time to pay them they are always saying we are sorry we will fix it. This location has been through 4  financing mamgers since April of last year and each one has met with me at least twice but yet the problem still remains. Everytime I have put my car in the shop I get it back with the same problem it had when i dropped it off. I drive a chevy aveo 08 it has a whining noise when you go over 60MPH I have met with the service manager Steve 3 different times about the problem. The car is 3x over book value. I have been paying 402.24 amonth for a car thats worth a little over 7000 and the pricnicipal of the loan has barely dropped 200. I believe this company takes advantage of people by letting the warrenty wear off  before they addressed the problem. Bottom line is dont become a cictim of these people.