Through a web account:
Sign in to your My Rebtel account.
Go to Account settings
Scroll down to Set up notifications .
Remove check on boxes you would like notifications to stop.
Click Save preferences.
If you have other numbers registered in your account, please make sure that you choose the correct number you would want to remove these options for.
Through an email you have received.
Scroll down to the bottom of the email
Click Unsubscribe