Step 1: Sign into your GoGet account on the web browser and you can buy credits by clicking on the "Buy Credits" button on the navigation panel.
You will see packages like the following:
Click on the "BUY NOW" button of the package that you want.
You may pay with any of the option available.
Once you make payment, and you have updated your company details for invoice (Click here for more info), you will automatically get an email with your tax invoice like below: