A. Open the app and navigate to the 'Account' or 'Settings' section. Look for the 'Top-up' or 'Payment' options. There should be an option to manage your automatic top-up settings. If you find it, toggle it off. Make sure to save any changes before exiting the app.

B. If you cannot find the option to turn off automatic top-up in the app, try logging into your account on the Lebara website. Look for the payment settings there, as it may provide more options than the app.