Kia Motor Finance Hyundai Motor company Had me believe I purchased my vehicle then later came and took it off my property and now it’s on a auction lot Dallas Tx

This company made me believe my car was now mine because my account was paid in full after making my last payment January 27,2023 told me they will send my title in 30 days. Well I then went and put things on my vehicle like rims new tires and other upgrades because to my knowledge the vehicle was mine. Well come February 22,2023 my car is no longer on my property I immediately called the police made a report. I then called kia they claim they had nothing to do with it there was no repossession on my vehicle make a police report. Well I did and they even assigned a detective to my case, he then had me call kia so they informed him that there wasn't a repossession on my vehicle. After investigating he found out that a company said they had legal rights to the car in the car was there, this company I know not of but apparently kia sold my vehicle twice without my knowledge now kia keeps giving me the run around there is never a manager I can talk to...now I am out of a car in a lot of money....I have lost my job behind this and now it's hard for me to keep up with my bills see I was a delivery driver so without my car I can't work. I just need answers and no one can give me any, the people in possession of my vehicle is not giving me any information of where my vehicle is or my belongings it's 2 months in.