Looking for a Mustang garage in Musaffah that actually knows these cars.

I've got a 2015 Mustang GT that's been giving me a persistent misfire for weeks, and the general garages I've tried have been useless—just guessing and replacing parts without any proper diagnosis. A mate who's into cars mentioned that the issue could be something as simple as a failing ignition coil, which is a common problem on the Coyote engines, but I need a specialist who can actually confirm it with a proper diagnostic scan. I'm after a  Mustang garage in Musaffah  that has the right equipment and experience with American V8s. Has anyone had a good experience with a workshop in the industrial area that actually took the time to diagnose the root cause rather than just throwing parts at the problem? I'd really appreciate a recommendation.