I want to block my stolen iPhone so that no one can use it...can you please help me

This support article has a list of things to do if your iPhone, iPad, or iPod touch is lost or stolen. --> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

- The Find My service described in the article is the only recovery feature Apple offers. It must be set up before the device is lost.

If your phone has a secure passcode then they can't easily get in. If you have also enabled Find My you can mark it as lost and if that can be communicated to the device it will make it even harder.

Good evening,please I want you to block my stolen iPhone so that nobody can use it .Model: iPhone 7plus:version iOS 15.1

thanks

[Edited by Moderator]

We can't do that for you but you can do it yourself. Read what I posted [previously.