To check if you have opted in for Marketing campaigns in the Ding app, go to Account:

 

 

Select Account settings and Contact preferences:

 

 

 

There are different types of marketing notifications that you can turn on or off individually and press Save Preferences.

• Operator promotions: Get timely notifications about the best deals from your favorite operators.
• Ding discounts: Learn how you can save money on your next top-up with exclusive Ding discounts.
• Ding news and updates: Be the first to know about updates and new features.
• Reminders: Ding will send you reminders for special occasions (e.g. Mother's Day).

You can Opt-in for all 4 categories at once by clicking on Turn all on.