You will not see the Pay With GasBuddy discount at the pump. Instead, it will be displayed on your receipt and in your transaction history.
Following each transaction, an email is sent containing a transaction receipt. Check your spam folder if you aren’t seeing this email in your inbox. Transaction history is also available in the GasBuddy app. Click into the menu in the top left corner on the home screen, then 'Savings Settings', then 'Your Pay With GasBuddy Account'. Here you will see 'View Transactions'.
Here you will see a full breakdown, including any activated discounts, additional coupons, membership discounts, and more. The discounted amount will be withdrawn within 1-3 business days.