Long waits to get car serviced does not thoroughly...

Long waits to get car serviced does not thoroughly check out maintenance checks on serviced vehicles have had problems with the service personnel as to accurately checking vehicles. Fluids not serviced and was told they were fine when they actually needed service . After we took the car back and $800 later for breaks and rotors which should have been discoverd to begin with , after the brakes were replaced by them around 30000 miles ago. Looks like their service isn't as good as it should be. suppose they had failed in the meantime it could have been very bad. Are they not responsible for the safety of their customers by the work done on the cars they service ? very irresponsible if you ask me