Click on this link for general information about what to do "If your iPhone, iPad, or iPod touch is lost or stolen" --> https://support.apple.com/HT201472
- The Find My service is the only recovery feature Apple offers. It MUST be set up before the device is lost. If you did not do that it is too late to do it now and there is no other feature Apple offers that can help you find it.
Click on this link "If you think your Apple ID has been compromised" --> https://support.apple.com/HT204145
'Checklist: If you want to see if anyone else has access to your device or accounts' click here --> https://support.apple.com/HT212021
Security and your Apple ID - https://support.apple.com/HT201303
Contact Apple for help with Apple ID account security - https://support.apple.com/HT204169 "This article provides country-specific Apple Support contact information for customers seeking help with their Apple ID password or other security-related issues." Better for directly reporting an issue.