Purchasing Portal Credits
To buy portal credits for your account, navigate to the Buy tab > Portal Credits options.
Enter the amount to be added to the portal account and click on Make Payment.
Choose the payment option and click on Review.
After reviewing the purchase summary and payment details, click on the Purchase Button.
Once the payment is successful, you will get a payment confirmation message and the purchased credit will also be updated on the Portal and you will be able to see the Credit Balance by navigating to Billing -> Purchase History -> Credit Usage.