Discovery 4 air suspension nightmare – any honest garages in Abu Dhabi?

I’m honestly at my wit’s end with my 2014 Discovery 4. The amber suspension light came on a few weeks ago, then the truck decided to drop to the bump stops in the middle of a school run near Khalifa City. Managed to limp it to a garage that claimed they could handle Land Rovers but all they did was clear the codes and charge me 800 bucks for nothing – the next day the same problem came back. Been scrolling through forums and saw someone mention https://800sayara.com/land-rover-repair-abu-dhabi/ as a starting point to find specialists, but I’d rather hear from real owners who’ve been through this. The compressor is running constantly and I’m hearing a hissing sound from the front driver side, so I’m guessing a split air strut or a leaking airline. Has anyone replaced just the faulty strut instead of all four? And which independent workshop in or around Mussafah actually understands the LR3/4 air system without just throwing parts at it? Really don’t want to sell this car because otherwise it’s been solid, but this suspension issue is driving me crazy.