Click Storefront in your merchant portal and select Checkout.
Copy the Recharge script from here and replace YOUR_SOURCE_NUMBER and YOUR_MEDIUM_NUMBER with the one we provide you in your integration documentation. Make sure to use the right country code. If you are using sovendus for multiple countries, make sure you define YOUR_SOURCE_NUMBER and YOUR_MEDIUM_NUMBER in the script as well.
Paste the script into the Thank you page text box and click Save.