Unsatisfactory car service procedures

I'm extremely disappointed with the service received at Renault Gateway. Took my car for a service last week Wednesday.

When a client brings a car in for a service why is it that a client isn't not notified of what's going to be done to the car?

Secondly when a car is brought in why isn't an inspection done on the car of what scratches or dents are present when a car is brought in? Today I noticed that I have a scratch/dent that I wasn't aware of.

Why aren't clients notified on time when the car won't be released the same day? I received 2 calls from a driver that I'm going to be picked and we arrange the location as to where I'm going to get picked up and after 20 minutes the a guy from Renault calls saying the car won't be released today.