Im a frequent costumer especially during car servi...

Im a frequent costumer especially during car service maintenance to Serpa Chrysler. But today I was dissappointed about the service, here's why:
I have an appointment at 10am. I came there exactly at the given time, i was scheduled for service and ask for an oil change. Usually it only take me an hour wait for an oil change, but today they told me to come back after 2hrs. So i agreed and waited. But after 2hrs passed. They called me and told me that i have a nailed wheel on rear left tire thats need to be patch and it cost me $60 for a patched. To make it short why they let me wait for 2hrs then told me about the problem, then i have to wait for another 2hrs for them to finished the patched. For an oil change service and a tire patched it takes them 4hrs. To finished the work. 4hrs waiting was really dissappointing.!! Really dissappointed!