The three steps

1 · Pick. Choose an application from the catalogue↗ and a level. Add as many as you like — different agents, different levels, more than one of the same thing. Your order lives in this browser and nowhere else.

2 · Get your reference. Your order↗ carries a reference like SG-K7M3QB and an order line listing the product code for everything in it. Copy it. It is not an account and it is not stored anywhere but your browser.

3 · Pay. Two rails, and you pick one. The provider takes your name, your contact and your card on its own pages. What this site hands it is the amount and your reference.