How to get rid of supervision So, I today I went into my settings to see that my iPad is being supervised by some school. I don’t even go to this school, I had to look it up to realize it was a school, and they don’t even own this iPad. I certainly know this was not there before,I don’t know how long it has been in supervision for but I’ve only now seen it. I looked up how to remove the supervision and I was told to factory reset my iPad so I tried but it is telling me that there was an “error connecting to the Apple ID server”. I’ve realized just now that this happened like 10 min ago as my WiFi stopped working out of no where and it is asking me to put in the password for the WiFi which is strange. I don’t know if it has restricted anything but I sure don’t want them controlling my iPad.
The serial number may be claimed - correctly or incorrectly, you have two options.

If you can get to settings see if you can determine the exact address of the management server (get screenshots) and then try to remove the profiles.
If that doesn’t work, you have to handle this administratively with the School and/or Apple. Collect all your receipts for purchase so you can help clarify how you came into possession of a device that’s marked as school owned.