Cam Sensor Change

Had our 2001 Honda Civic towed in and diagnosed as a bad cam sensor. Two days later picked car up after repair. That saem night the car died and had to be pushed into the drive. I put my own code reader on it and it said bad cam sensor. Looked under the hood and found the wire cover had been left off. Towed car back to shop and they did indeed replace the sensor (again?). Brought car home and now it has a huge oil leak at the valve cover gasket and upper time belt cover. Will repair myself as we have no confidence in this shop.