Transfer Case problems of the 2015 Ford Expedition

While traveling in the passing (3rd) left lane on interstate highway with speeds of 65 to 70 mph, the vehical totally loss power, motor still running but just at an uneven poor idle, still in gear, I attempted to accelerate, it did absolutely nothing yet the motor was still at the poor idle. On the dash comupter a wrench appeared with "see manual" along with a small check engine light above that. I was forced to get out of that dangerous situation with no power, coasting through 3 lanes with my wife waving out the passenger window to let my powerless car drift over. Once off the highway, the motor was still poorly idling, giving it gas did nothing, still just a rough idle. I shut the car off and restarted it and miraculously I once again had control of the accelerator. I was still 3 hours from home with all highway driving ahead of me, which I did doing 55mph in the slow lane & ready to turn off road. I bought a new vehicle as to not have problems, let alone the most dangerous episode of our lives. What really is unacceptable is that I just had a 70k mile checkup at a local Ford dealer where I was told they reccomend changing my transfer case oil along with an oil change & tire rotation. I was given a clean bill of health for a road trip. I refuse to pay anything for a flaw in their design, especially being a dangerous safety issue.