Ally Auto Wrongfully Repossessed My Car, Help, What Can I Do

I financed a 2013 ZL1 Camero, I put 25,000 down, have always made payments, sometimes I would double up on payments, ally send a repo company out here with no information and took my car, Ally locked me out of my account, would not help when I call or would keep transferringe, I would wait for 2 hours and get disconnected, I dont know what else to do, I have finnally located the car at a auction but how can I get it back? Please help