Auto shop rip off

Salem auto in wisconsin towed my car and I told them the fuel injectors were probably bad. They dropped the gas tank then 'repaired' the fuel lines costing me $108. Well after they realized that wouldnt work they wanted to charge me twice as much as every other shop to do the fuel injectors. So I took my car home. When I got home I jacked it up and its missing a fuel line now coming from the gas tank. After the lines come out of the gas tank(there used to be 2, now theres just 1) they go into a Y shaped adapter(under car near gas tank) that runs them to the engine, at the Y adapter there is one fuel line and the other side which HAD one no longer has one. I plan on going in when they open next (tomorrow) and talking to them. What else can/should I do? Or is this some sort of proper procedure when my fuel injectors and bad? They didnt do anything to my car but ruin it more and charge me to pay for it. What should I do?