Do the instructions on this page help?
I found this on the site:
TWC TV® is supported on 2012 and 2013 model Samsung Smart TVs (LED and plasma) in series: 550, 5300, 5500, 6100, 6150, 6300, 6350, 6400, 6500, 6550, 6580, 6900, 7000, 7003, 7100, 7150, 7500, 7550, 8000, 8500, 9000 and S9. Note: Samsung Blu-ray disc players are not currently supported
I have a 32H6350, but it is considered (by Samsung) as a 2014 model. These just came out a month ago.
That link you posted doesn't say anything about the new 2014 models. I just bought the UN40H6350 and I don't see the TWC app on it.
Where is it?
Right! Wrong year for the TV cited in the supported list. Well, who wants to spend minutes/hours on the phone about this? _All I need_ is a projected release date if its still in testing.