Why my phone stopped suddenly and touch not working?

Hello Aya_photo,

Thank you for reaching out to Apple Support Communities.

These troubleshooting steps can help with your display not responding to touch:

"If your screen is too sensitive or responds intermittently to touch

1. Restart your iPhone or iPad.
2. Make sure that your screen is clean and free of any debris or water.
3. Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different outlet, cable, or charger.
4. Remove any cases or screen protectors."

Additional details can be found here: If the screen isn't working on your iPhone or iPad

If the issue persists, can you provide a few more details? Which iPhone and iOS version are you currently using? Is your device responding at all? Also, are you seeing any errors or alerts?

Cheers!