I have a separate phone number I use for booking hotels, and I also give it when renting cars. Just so I don’t miss any important updates or info. Try it, it’s convenient. Speaking of car rentals, I really want to share a great option in Dubai https://dcr.ae/sports-car-rental-dubai/. I don’t have a lot of experience, especially with expensive cars and sports cars and all that. But everything went perfectly here, the staff were awesome, and the cars were in great condition.