I want to turn off notifications from the app.

Notification from the app can be turned on/off on the setting page in the application or your device.

[In-App Setting]
ON/OFF setting:
Menu icon → Gear mark → Turn on/off

[Device Setting]
You can check the notification setting of each application from the “setting” page of your device.
Please turn off the notification of “PKCL Twins” from there.

【iOS】
[Settings]→[Notifications]
Select [PKCL Twins], and turn off the notification

【Android】
・Open the Setting app on your device
・Tap "App and Notification" and "Notification"
・Check which apps have sent notifications recently under "Most Recent"
*Tap "Show all from last 7 days" to show more apps
・Tap "Advanced settings"
・You can turn off all notifications on the apps shown in the list
*Tap the name of the app you want to deactivate the notification from a specific app

The procedure to change notification setting may be different depending on the device.
For further details, please contact the corresponding manufacturer.