Below service expectation and angry

I never expected the service I received today, way below my expectation, not what I know from the Dealership that I've been using for years. I telephoned them on Monday to book service for my nephew's car, and was told to bring it on Wednesday, 01 Feb. When I arrived at 07:07am, I was told there was no ticket for booking - booking not on the system but I shouldn't worry, ''it will be sorted''. 30 minutes later I'm still waiting. All people that came after me have been helped, some even left. I'm also in the hurry. I needed to get home and start working, had to start working at 08:30am since I promised my boss that I'll work from home, at least from 08:30 will be working already. From the Dealership to my house is just a kilometre or less. And I was early for the same reason that I need to home before 08:30am. I explain this to the guy there who seemed to be relaxed about the issue and didn't understand the urgency. Almost 50 minutes later I'm still waiting. This time I was told they're still waiting for someone who has access to the booking system. Why I was not told? At least I'd have expected the delay. In my mind I thought I was just being ignored, (maybe I was). Eventually I decided I'll leave the car - gave them my contact details and left. I couldn't wait any longer, I was being taken for granted. I didn't have the whole hour to wait not knowing what is going to happen and when. I walked out of the Dealership. I had asked for transport when I made the booking but when I left I was not even asked if I needed it. Little did I know that when I request Uber ride I'll wait another 20 minutes, and should have just walked home maybe the steam would have blown off. I left the car there with my contact details. I'm waiting to hear from them. This is bad and I didn't enjoy it at all. Maybe they like client's throwing tantrums but it takes lot of emotions and it ruins someone's day.