First step to solving any problem with a PC game is always to make sure everything is up to date.
Service Packs, DirectX, Drivers (and when I say drivers, I mean all of them. Video card sure, but also sound, network, chipset, etc), everything.
I say this for two reasons: One, it's good sense. If the game is new it isn't so unreasonable to assume that the game will be making use of the newest software technology. Second, because Tech Support is not going to help you with anything until you do. They'll ask you, "Did you try updating your (whatever) drivers?" If you say "No", they'll say, "OK. Try updating your (whatever) drivers and see if that fixes it."
If you're going to attack Tech Support, best to do it with a fully loaded weapon. The weapon, in this case, being your computer.
If it happens again, try checking to see if you have any other controllers/input devices plugged in (gamepad, joystick, 3D mouse, etc...) and unplugging them.
Some game engines tend to accept input from any device it sees plugged in.
(I've had some games become unplayable when they insisted on using input from my 3D mouse...)