I dont think that they will give you a chargeback when it seems your problem is not the software but only your own ignorance.

As a beginner you normally have no clue how to use Gamestudio, thats absolutely normal, so why dont you just start with the tutorial like everyone else? By opening WED and just wildly clicking some buttons you will never learn how to make a game.

Follow the tutorial step by step, everything is explained there. When you need a behavior for your entity, you must write a script that contains that behavior. The tutorial shows you how to do that. Once you got the basics its really simple.