Problem with data package option in Lumia 920.

I'm having an issue somewhat similar on my Lumia 920. Unfortunately, I can't simply solve it by turning data "on." In fact, I already have data on, I click on "Get media content (1KB)" for group texts and "Get media content (32KB)" for pictures, and for some reason it goes into a state that says "Getting media content…" but never actually downloads. So, I can't refresh the message nor can I try to re-download. It is extremely annoying to have to ask people to re-send things many times over.
