Autovest LLC review: Scam

I have left my car in Autovest LLC. They have sold my car to another lender and now I got the notice that they have put garnishment and they have started the lawsuit. I recently called them to make the payment arrangements and the agent said that it would be about $1, 500. When I spoke with this agent next time, they have increased the sum of the payments. In order to remove the garnishment, I need to agree to all their rules and conditions.