My movie won't download on my iPhone?

I'm on a long road trip and to pass time I rented a movie from the iTunes Store. I bought eraser head. My movie started to download and after I left the hotel which had the internet connection it stopped downloading. We're on a train at the moment that has Wi-Fi I tried to download again. I go to rent a movie. The iTunes Store says I already bought it, it just needed to download. I go to my downloads. Sorry can't download, retry?

I really need help because I've been trying for a hour and it won't download help me please! My movie won t download on my iPhone

Have you tried signing out of your Apple ID and signing back in? This is a known bug that Apple still hasn't addressed, usually refreshing your account by signing out and back in fixes it

You can sign out by going to Settings > iTunes & App Stores, then tap the Apple ID signed in.