Transmission issues for Ford Focus

I am an angry, frustrated and disappointed owner of a 2012 Ford Focus. Bought new in January 2013, a mere four weeks later it was in for repair after it started to shudder severely on takeoff. Now, 18 months and five attempts to repair later, the car is running worse than ever. Disappointingly, Ford Australia is not prepared to discuss other options until the car has been repaired for a sixth time. I've no confidence it can be repaired and I'm deeply concerned about being left with this lemon of a vehicle. Ford has admitted a problem with the model relative to the issues I have been experiencing and has offered an extended warranty. Two Ford dealers said there has been a fault identified on a number of vehicles. Any information you can provide is greatly appreciated.