Questionable car services by Ford woodmead

It's so shocking that I took my car for service at Ford woodmead only to return it dirty more than the way I took it in for service. Oils on my steering etc. Tags on the keys. I did sign for payment of what they claimed they did on the car . My question is .if they can give me the dirty car , what about the service they claimed to have done. Did they serviced the car or it was just give me the car as it was and invoice simply?