Rolzo is a great resource for booking private transportation to virtually any destination in the world. They also offer rental cars. This is a luxury provider and the pricing can be higher than most, but they have excellent customer service and very nice vehicles. I have used Rolzo for years with no issues. They pay commission on all of their services, including VIP Meet and Greet at airports.
You can log in and track your bookings with your individual account. You may also book transfers through the Rolzo app.