Made appointment on line to get an oil change. Ar...

Made appointment on line to get an oil change. Arrived earlier for my appointment and was told that they don't take appointments to get oil changes. That I had to wait in line for the "speedy" oil change. There were 3 cars ahead of me in that line and they said it would be 1 1/2 hours before they could get to my truck because they were under staffed. If they don't have enough staff why are they taking appointments? Why do they accept appointments for oil changes on line, but don't honor them at the facility? They need to fix their system. I am stuck by my warranty to get my oil changes there, and I have to put up with this poor service and poorly designed system.