they sent you coupons to lure you in, then they purposely find other thing wrong with your car and charge you big price, if you use your credit card and find out they did ugly work on your car, you should dispute with your credit card company, that's what credit card company are there for, don't just let them have it, and if they ever suggest you do have any work done there, just say no, 99% chances are they are lying to you. They won't let you stand by your car and watch what they are doing either, so they can tear up your car all they want, please do not come here.