So that's a dead end. http://www.samsung.com/us/video/tvs/UN55C7000WFXZA didn't list an Amazon app so head to http://www.samsung.com/us/appstore and see if it's there.
Have a samsung unc7000
How can I get movies from Amazon download?
Do not see an app under internet TV for amazon.
Can I download to a flashdrive and use usb port?