damn dude, that sucks. Id report that place to BBB if they are a member, thats just unacceptable. do it yourself man. it couldnt be any simpler

1. jack up car, take off wheel
2. unbolt two bolts holding caliper on (hang it from a bungee cord or something so you dont F up the lines.
3. then i believe there are two more bolts holding a brace/guide type thing(sorry dont know the name).
4. Unscrew the 4 screws holding the rotor on
5. reverse all that to put the new rotors/pads on. torque it to spec, bleed the lines if neccesary and youre done. easy as that.

I dont see how a shop can screw that up(granted the first time i did it i overtorqued the caliper pins and wore down a pad on one side) So learn from my mistakes!