Very unhappy customer

I'm very dissapointed in the service I received. Monday, 22 June and took my car and was at greenpoint branch at 07:20 and booked the car in at 07:30 for a Grand Prix wash was asked by when I would need the car and I said 12:30, the person assisting me ask if I could rather come 13:00, which I agreed. When I came back at 12:45 they were still busy and only finished 13:30 which made me late for an appointment I had, 2nd concern I had, I fetch my wife and newborn baby after that but to realize that the back seats was not only wet but still dirty and this really upset me. Why would someone pay so much money and get this kind of service. I was going to send this message yesterday but still felt very upset and would have sent a very different message. Hope this message is taken and something done about it. I even took photo's of what my wife pants looked like and we were on our way to family ?. To proof the seats was dirty I laid a bed pad on the back seat and after a few minutes just sore brown marks, almost like coffee. Now I understand that this was the dirt in the seat but I paid R750 which included cleaning my seats....