If you only wanted to evaluate their product, why didn't you use the free trial available for download? I just checked that site now for the first time myself and it was pretty obvious how to get one.

Refunds cost time and money to process and are a demoralizing pain in the tail (fwiw, we provide our rarely requested refunds immediately with no hassle and no questions asked) and a purchase with an immediate request for a refund typically screams 'pirate'.

Your opinions seem belligerently set in place, so all I can offer is the Independent Software Developer's Curse: "May you have customers who act just as you do".