Download error. Tap to retry

I work in an I.T department and I have been trying to fix this issue for my Boss' Boss' Wife' Ipad. Attempted all previously mentioned solutions, none of which solved the issue. I should also mention as I have not seen anyone else write it, tapping the blue download arrow does nothing, and I am unable to swipe right so the delete button does not appear.

Additionally, going into edit shows a delete button which is greyed out. None of the fifteen or so failed downloads are able to be installed.

I have found a partial solution, but it is not consistent.

1. Attempt all previous troubleshooting as mentioned in this thread
2. Turn wi-fi back on and sign back into itunes/store account (I was using the account that origionally made the purchases)
3. For each pending download, navigate to the itunes store page
4. This is where things get tricky. Sometimes you will be able to tap a circle/square/cloud with a DOWN arrow in it, and that will be enough to clear the download from the list
5. However, in most cases, you will need to hit the arrow (play) button, and let it stream. Skip to the end of the content (especially if a movie) and let it finish normally, this will take you back to the origional store page
6. You should now have a cloud button with a down arrow in it. Tap this, it will spind, and the cloud with the down arror will appear it again. Tap it a second time, and it should start a full download of the file. Presumably, you will need enough space on your device for this to work. Once complete, it should be cleared from the download list, and you should be able to delete it from your device.
7. Repeat these steps for all files

NOTE: If selecting a movie, make sure the right quality (SD/HD) is selected on the store page to see the download options as described above, otherwise you will see a $ price promting you to purchase the other quality version

NOTE: As I was doing this at work, I had the IPAD plugged in and did not allow it to lock or sleep, tapping it every time the screen went dark. Theoretically this should not affect it, but you may wish to baby sit you device on the first attempt.

Dealing with apple and iDevices is a nessecary part of my occupation. However, my professional opinion as an I.T Support Specialist with a Network Admin background (CISCO certified) and over half a decade of enterprise experience, is: If you aren't forced to work with Apple, DON'T. BUY. APPLE.