Premium channel apps not working

I am EXTREMELY frustrated  I got u-300 for the movie channels and added HBO. I want to be able to use the apps such as HBOGO and SHOWTIME ANYTIME. But everytime I try I get the error message saying your Uverse subscription does not have this movie channel. I've called and talk to technical support and they have me try a bunch of things and then they said well Uverse isn't really compatible with those apps so you can just watch it off the U-verse app. If Uverse is not compatible with those apps why did you have me try a bunch of different things to log into those apps?! Clearly somebody just doesn't want to do their job. I don't want to watch the content off the U-verse app because the U-verse app doesn't have all of the content that the apps such as HBO Go and Showtime Anytime have. And on-demand doesn't have all of the content that those apps have either. I'm very frustrated I want to cancel my service because of this among other things that have happened that nobody wants to help me with. Please find a solution I would very much appreciate it.