1. Go to My Account > Play Responsibly > Account Cool Off.
2. Select a time period from the drop-down menu.
3. Click 'Confirm'
4. Click the 'Submit' button on the next screen to activate the Cool Off. Once you've clicked 'Submit', the Cool Off cannot be overridden or removed until the selected time period has passed, please be sure to select one that you're happy with.
You can do this now by clicking here.