SDS IAM & EMM Managed iOS device
An iPad is deleted from the SDS IAM & EMM console, before it was unenrolled. This article explains how to troubleshoot when a device is stuck on Kiosk mode.
Unfortunately, when your device is in this state, you have to reset the device using iTunes.
The instructions are located at the following link: https://support.apple.com/en-us/HT201252