Get my van from shop

My van broke down I told them do one side on my. Some how they did both sides . Now I owe them 470 bucks that’s not what I was told. I paid 200 Now I can’t get my van back until I pay this . People can call 6363439797 and pay them directly I don’t care it’s Fenton auto shop I need help to get my van please . It’s my only transportation I had 200 pay on the 470 bill it was it . Which 270 is still due before I can get it back . I’m broke after paying rent deposit to move into an apt