My 2018 Escalade's transmission is hesitating

My 2018 Escalade's transmission is hesitating – any specialist recommendations in Sharjah?

I'm trying to get my Escalade's gearbox sorted and honestly, I'm having a nightmare finding a workshop in Sharjah that really knows these 10-speed automatics. The car's been hesitating when shifting from 2nd to 3rd, and sometimes it feels like it's slipping under hard acceleration, which is pretty worrying for a heavy SUV like this. I've read online that these transmissions can have issues with the valve body or torque converter, but I don't want to just throw parts at it without a proper diagnosis. A mate mentioned he had a good experience with a shop in Industrial Area 4 that has Premium Cadillac Gearbox Repair Specialists who use proper diagnostic tools and actually take the time to scan the system properly. I'm hoping to find a specialist that will check the transmission fluid condition before recommending anything. I'm in Industrial Area 5 myself, so anywhere nearby would be ideal. I'd really appreciate a recommendation for a place that's honest and won't just try to push a full rebuild on me.