Good morning Bettermost friends!!!!

Hope that everyone is having a good day!
Mine is ok so far (considering it's not even 7am) but I have some shit to deal with today.
I've been making payments on my car, my last payment was supposed to be in January. I've been making double payments, and my last payment arrived in the mail yesterday.
They are claiming I owe them almost $2,000.00!
I'm calling them to find out how they get this figure.