I understand your frustration and am sorry you had an experience like that. However, you do say "they have a 30 day trial version". You also imply that you did not take advantage of that. At my workplace, we are required to take advantage of offers that. We never buy anything without fully testing it. If it works, we buy it. If not, we explain to the company why it didn't work for us and why we won't buy it. I have heard of other companies that have a "we gave you the opportunity to test it before buying and you turned it down, so no refund" policy. It may sound like poor customer relations, but they did offer to let you test the product for FREE. And you didn't do so. If you had, you wouldn't have bought their software, they wouldn't have had to take it back, they wouldn't have had to refund anything. Everyone would have been happy. BUT, you bought without checking to see if it would work for you. I'd get fired if I did anything like that.
I hope you get your refund....but I also hope you learned a lesson. When you are given an opportunity to test a product for free, DO SO.