Air suspension warning light came on again, is Musaffah really the place to go?

This is the third time in two months my Range Rover has thrown up the suspension fault message and I'm starting to lose my patience with it honestly. First time it happened I panicked and drove straight to the dealer, they cleared the code and charged me a small fortune for what felt like nothing, then it came back a couple weeks later. Second time I went to some random garage near my place in Khalifa City and the guy kept my car for five days only to tell me he couldn't figure out the compressor issue properly. A mate at the gym keeps telling me the industrial area is where the real specialists are, something about ex-dealer techs setting up their own shops there, so now I'm looking into Expert Range Rover repair in Musaffah before I waste more money guessing. My main worry is whether these independent places have the proper diagnostic software for air suspension and all the electronic stuff, because the last guy clearly didn't. Also not sure if I should insist on OEM compressor or if aftermarket is fine for these cars, some people say it lasts just as long, others say never risk it. If anyone has actually dealt with suspension or cooling problems on an L494 around here I'd love to hear how it went and roughly what it cost.