Looking for a proper AC specialist in Sharjah – any recommendations?

Honestly, I'm at my wit's end with my car's air conditioning and the summer heat is starting to get brutal. I've already taken it to a couple of general garages here in Sharjah for a re-gas, but the problem just keeps coming back, so I've learned my lesson about trusting just anyone with these complex systems. I'm driving a German car and I know that finding a garage with the right diagnostic tools is crucial for tracking down issues like micro-leaks or failing sensors, rather than just guessing. I've been looking around and came across some Certified Air Conditioning Experts who apparently use advanced diagnostic tools and have years of experience with various systems, but I'm not sure which workshop to actually trust. I've also seen places like Al Hadi AC Repair with good reviews mentioning honest work and fair pricing, and John Paul AC where people seem happy with the service. Has anyone here actually had a positive experience with a specific garage in Sharjah that sorted out their AC problem permanently? I really need a solid recommendation before this heat gets even worse.