Took my van in because of a sound that sounded lik...

Took my van in because of a sound that sounded like bad breaks, calipers or rotors. They did and inspection that usually takes longer than 15 minutes along with a tire rotation and they said everything was perfect. A week later the sound got worse. I took it in again and they told me two sets of break pads and rotors need to be replaced for 570 dollars which would have been covered under the initial inspection. Really!!! They're running scams.