Where the chauffeur stands
After passport control and the baggage belts you walk through customs into the public arrivals hall. The greeting line, a railing where drivers and hotel staff hold their boards, is directly in front of that exit. Your chauffeur stands there with a board showing the name from your booking, and stays there for the full free hour.
You do not need to find the car. You need to find one person holding your name, and they are standing where everyone walking out must pass.
If you cannot see the board
Do not walk to the car park and do not leave the hall. Stay by the greeting line and message the office on WhatsApp with your booking reference. The office connects you and the chauffeur directly, and the reply comes day or night.
The usual reason for a missed board is an early exit: passengers with only cabin bags sometimes walk out sooner than the landing time suggests. The chauffeur is on the way to the line, not absent.
Late flight, early flight
The office follows the flight number, not the booking clock. Early or late, it moves the pick-up to about 45 minutes after the actual landing, roughly when you walk out into arrivals, and the fare stays where it was. The free hour starts from then. If passport control or the belts run unusually long, tell the office and it can move the pick-up later still.
One tip that saves ten minutes
Put your flight number on the booking. It is the single field that lets the office move your pick-up to about 45 minutes after you actually land, and it is the difference between a board that is already up and a chauffeur still parking.