Click on the 'Top up' button from the homepage.
Select your preferred top-up method. (For crypto top-ups, see here.)
Select the currency of your top-up method.
Enter the amount you'd like to top-up, and select your preferred Payment network.
Review the transaction details and click 'Continue'.
Use the provided details to initiate the top-up from your preferred payment method.
And you're done!
You can always check the status of a transaction directly in the dashboard.