Someone use my id and phone

Are they using your phone or your phone number? Did you lose the phone?

Check your device list to see if there is a device signed in that you don't recognize. You can remove the device using the steps in the article below. As a precaution, change your password.

Apple ID device list -Check to see where you‘re signed in.   * 

 Apple ID Password Change.   -  

ASC YouTube for How to reset your Apple ID password

 What to do after you change your Apple ID or password - Apple Support  -   I suggest doing this before you change your Apple ID or password.

If you lost the phone, have you tried using iCloud.com/Find My Phone?

Find My Phone - Lock and track your device using Lost Mode.  * 

Find My Phone - If your device is lost or stolen. *