I took my car to a dealership I worked at for an oil change. They told me they put 5 quarts of oil in it.The service was done, car seemed fine. About 5 days later my car has a knock in the engine. I took it back to the same shop, they verified it wasn't leaking or burning oil(per the service manager) In this time I got a new job and quit working there. They completely have my motor tore apart and are now telling me to come pick it up as is, not put back together.They are telling me they wont put anymore "time & money into it" Its obvious there was not 5 quarts of oil put in it. Is it legal for them to give me my car back basically torn apart?