I have been talking to my nephew about this...he is a manager with the local Ford dealership and a time-served mechanic.
His best guess at the moment is that the battery is flat in the car. Don't be led stray about the red light on the dash...this requires only the smallest smidgen of battery power !
If the car had its dead locked applied and then has been standing around, the battery could have gone flat. Check if you can open the bonnet....some Fords have this facility where you can twist the oval Ford badge, put the key into the lock and open it ....the dead locks don't apply to the bonnet.
If you can, charge the battery up.
Also, there is a small chance that the "pairing" of the keys and the car could have been lost somehow, and the car will need to be re-coded....not a big job for the Dealership to do
If you can't get into the bonnet, then my nephew says its a job for the Ford Dealer. It might cost a bit, not too much, but on a car that is only a few months old, its got to be worth it !