Someone stole my iphone

Sorry about that.

In such a situation, these are the only steps you can perform:--> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support, and/or:--> Use the Find My app to locate a missing device or item - Apple Support

Regards

Giulio

If "Apple Security" sends a message and gives you a link to follow, ignore the message. The link will skim your AppleID password and you will lose the ability to track the phone or lock it.