Bad service

Took my bmw 135i for a major service after collectung it was smelling oil from the motor,then it startrd having a miss just to find out the technician who worked on my car broke a oil breather pipe and didnt say anything also he didnt fasnt the coil packs properly and varous bolts and covers were loose very poor workmenship cost me extra money to fixed after payung almost 10k for a major service ,very dispapointed