My IPhone is disabled /the message is coming on my iPhone is?

You will need to restore the phone using a computer. The process will erase the device. Later you can restore your data from a recent back-up. Instructions here...

If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

If you need to install iTunes, click here...

Update to the latest version of iTunes - Apple Support

Follow the directions in this link to erase the phone using your computer with iTunes --> If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support