The best way to get into your car when you’ve locked the keys inside is to call a locksmith. Modern cars have protections in the doors to keep you from being able to use a coathanger or a jimmy to unlock the door from the outside. In some cars, it’s just not possible at all. If the locksmith is unable to do it, you can call the car dealership, and read them the VIN number from your dashboard and they should be able to order a new key for your car. In some cases, they can go ahead and make it right there for you.