You'll get the fast answer and can ask follow up questions.
In the USA that's 1800SAMSUNG
In parting there has been some flaming over the loss of apps. Rovi for example was in the news over their patent fight (they lost) which appears to be partly why the guide app vanished from Sony, Samsung and others. Amazon? Haven't heard much yet.
Our almost 2 YO Samsung decided to delete the Amazon Video App this morning. When I went to reinstall I received an 'Error Code 11' message. I was able to download other apps, just not this one.