Unable to get chosen apps to download, icon stays dark and states waiting, been 24 hours, no change
Firstly, check your network connection. Can you successfully load a webpage in Safari?
Try restarting your device, and see if they begin to download then. You may also like to sign out of your Apple account in Settings>iTunes and App Stores>Apple ID>Sign Out. Then sign back in again.
You can cancel downloads by holding down an icon and tapping the 'x' in the corner. You will not have to pay again if you redownload it.
Below is a relevent support document which may also be of help:
Have a great day,