tellt hem that you want it fixed because it was in working condition when you brought it in, if they deny your claim call soemtone about it, i'd most likely talk to the manager and say that you had it working and now it isnt.

i know a guy when he brought his car in they took it out and tore it up a bit witht he car, and then they brought it back and rolled the odometer back-- he knew they drove it because it was ass screwy... maybe they drove the car around and attempted to reset it?