Ipad pro cant turn off
Hi
Clicked on notification but iPad went to white screen, unable to turn it off to reboot or reset it. Able to swipe down to get volume, torch Bluetooth etc to be controlled but camera won't open. Right swipe brings across Apple news, weather etc but won't open. Notifications will come down but don't open when clicked.
Holding power button and volume button and quickly pressing volume and power button does not work.
Any suggestions greatly appreciated
Cheers