Ipad updating taking too long
I recently kept my iPad mini for update , it had options from back up data from cloud, back up from iTunes, and set up as new device. I first selected back up from cloud. but it showed no data to back up, later I went for set up as new device. It started updating , its been for than 15 hrs and still not updated yet. I need to keep tapping the device every 2 mins from it going off. There is not way for going back too. What can I do?
iPad mini, iOS 9