My Range Rover has been at the garage for three weeks now. I'm losing it.

Bought a used 2016 Sport a few months ago and it's been amazing until last month when the air suspension started acting up and then the infotainment froze completely. Dropped it off at a place that claimed they knew Land Rovers, but three weeks later they still can't figure out why the compressor keeps running or why the rear screen won't turn off. I'm honestly exhausted and just want someone who actually understands these temperamental beasts without treating every repair like a guessing game. I've been researching Range Rover repair and maintenance specialists Abu Dhabi and found a few options, but I'm scared of making another mistake and losing more time. Has anyone here dealt with a shop that really knows the L405 platform inside out? I don't mind paying for proper diagnostics, I just need my car back and someone who can communicate what's actually wrong instead of saying "we're looking at it" every time I call. Any recommendations would seriously save my sanity right now.