I'm very sorry to hear about this. Thanks for letting me know what you've tried thus far. Please try a factory reset as well: http://www.samsung.com/us/support/SupportOwnersFAQPopup.do?faq_id=FAQ00046660&fm_seq=49625#
1) Amazon app won't run, refers me to menu -> support -> software update.
2) Software Update is not available under menu -> support. I can see it, but it is not highlighted and I cannot select it.
Already tried a reinstall of Smart Hub.