Midas review: failed work

Took my preagnent wife's car in for what I was told a caytalytic converter. Manager stated that his computer read that car was leaking oil into 3rd cylinder and needed repair he quoted me at $1300. I told manager to fix because I needed car to be safe for wife.manager assured me car would be like new drivability. Well a week after they did work oil light came on it leaked out all oil. I took it back and manager said maybe they didn't bolt tight enough and stated car would be fine. Well a week later car engine leaked oil out and engine blew leaving my preagnent wife stranded now midas refuses to take responsibility . I regret going to midas.