Changing apple id
My ex won’t give me the password to my Apple ID login. How can I change my email on my ipad?
The following may help recover the password: If you forgot your Apple ID password - Apple Support and If you think your Apple ID has been compromised - Apple Support
or contact Apple Support to see if they can help.
I haven't read any of the following (it is a new document from Apple) and may or may not be appropriate for your situation: https://manuals.info.apple.com/MANUALS/1000/MA1976/en_US/device-and-data-access-when-personal-safety-is-at-risk.pdf