Accelerator Stuck problems of the 2013 Nissan Altima

The 7 inch central audio-visual and navigation unit periodically changes radio stations, crashes the navigation display, or crashes entirely going blank, and may or may not ask for sd card upon reboot. On one occasion the accelerator also stuck requiring the car to taken to the side of the road and turned off. Cannot be sure if the two events were related but they happened simultaneously. In the last six months the misbehavior of the central display unit has gotten worse and worse. Nissan dealer and national support are unable to find the problem or being willing to fix it. There is no escalation procedure to factory engineering and maintenance support. They will not take the elementary step to reflash the firmware or being willing to change out the unit. Multiple examples of this problem are reported online in Nissan's owner portal for this model year and the next. Despite being originally told that Nissan is trying to track cars with this known problem that Nissan refuses to address and leaving a potential safety problem unresolved.