If you’re having trouble getting the app to install or authenticating with your Apple ID, there are a few things you might try to troubleshoot the issue:
- Log out of your Apple ID and log back in
- Restart your device
- Check iTunes on your computer for the update, download it, and install it by syncing your iOS device with your computer
Otherwise, you may need to contact Apple Support directly, since they manage all transactions and App Store processes on our behalf.