Oil spots on the driveway, any trusted BMW oil leak repair in Musaffah?

I noticed a few dark spots under my 2015 528i last week and at first I thought it was just condensation from the AC, but they’re still there and the smell is definitely oil. It’s not pouring out, more like a slow drip, but I know these things only get worse if you ignore them. I’ve had bad luck with general garages before, one of them stripped a bolt on the oil pan and tried to hide it, so I’m not handing my car to just anyone. I’m in Musaffah and I’d rather keep it local if I can. Has anyone here actually used a trusted BMW oil leak repair in Musaffah that they’d go back to? I’d like to know if they diagnosed it properly instead of just guessing at the rear main seal, which seems to be everyone’s favourite answer. What did yours turn out to be and how much did it set you back?