Power Window problems of the 2009 Ford Escape

My Ford Escape is a 2009, 3 year old car with regular maintenance checks. On July 12th, I opened and closed the driver door and the window slid down. Once taken to get diagnosed, I was told the regular cable had gone out. I had it fixed and was on my way. On July 16th, just 4 days after, I was picking up dry cleaning, I put clothes in the back seat, and once the door was closed, same thing happened, window slowly slid down. No opening/closing windows to provoke it. I was told once again it was the regulator cable and needed to be replaced. Both problems exactly the same, within 4 days of each other. All mechanics and service reps told me it was very unusual that the regulator go out on such a new car. Called Ford corporate and was unable to get assistance to pay for this defect. How can a 3 year old car with no extreme use of the power windows be capable of such problems? the car is defective and Ford should've paid for the repair.