I have a Samsung Galaxy Fold 3 512GB which is less than 3 months old.  All of a sudden there is a thick black line anytime I unfold the device on the main screen.  The right side of the main screen is also completely unresponsive to touch.  The black line is as thick as the fold and does not go away.  I have factory reset the device, but it did not help.  I have been trying to get support from Samsung and have spent hours on the phone and chatting, but can get no resolution from Samsung.  This appears to be a very clear flaw in the device as I've read many other posts regarding the same exact issue.  Why is Samsung not taking responsibility for this flaw?  I was told it cannot be covered under warranty, and while I have insurance the insurance is stating that it won't pay as it should be covered under warranty.  I've been a 10+ Samsung customer and will no longer buy another product from Samsung because of the lack of support I've received.