Bentley Continental GT AC issues – any experience with Sharjah specialists?

I've got a 2013 Continental GT and the air conditioning has started blowing warm air intermittently, which is miserable in this weather, and the dealer in Dubai quoted me a crazy amount just to hook up their computer. A friend mentioned that independent garages in Sharjah can be much more reasonable, and I stumbled across https://caracrepairsharjah.ae/brands/bentley/https://caracrepairsharjah.ae/brands/bentley/ while searching for options, but I have no idea if they actually know these cars or if it's just a generic workshop. Has anyone here taken their Bentley to a Sharjah shop for AC work and had a good result? I'm worried about the labour quality and whether they can get genuine parts, but I also can't justify dealer prices for something that might just be a low refrigerant charge or a faulty sensor. Any honest feedback would be massively appreciated before I decide where to go.