Where are my podcasts?

Since I changed to iOS7, which I regret more than anything, not only are many of the Apple Aps unreadable, because they are now using colours which don't contrast, e.g. light blue on white(?), but I have found that my podcasts have disappeared too.

As to the former, maybe the engineers and developers have perfect 20/20 vision, but many people using the iPads, don't. There is no choice to put it into other colours either.

And as to the latter, all my podcasts have gone. When I hit the icon, I am shown a black screen for a fraction of a second and then it goes back to the home page. Anyone have any suggestions as to where they may have gone? I have looked in all the places that I could imagine, i.e. the iTunes page, Music, etc. I would appreciate any help as I miss my daily podcast.