oil change

I had an oil change done on my vical and it had some leaks on it and it was on my trany and all the bolts wear losse and they didn't tien the bolts or stop the leaks and they didn't check my transmission fuild and sent me on my way again with a leaking trany and now my transmission is shot and I need a different one and they are costing me more money than when I came in the door with. And they said too me that they don't check for leeks and titen bolts up unless you ask them too do so!!!! I won't go back their again becouse they won't do anything about their mustake!!!!!