Why did my refund request fail?

I made a refund request 8 days ago, still unanswered. The author did not return to my mail.
please make my refund request

Since you’ve already raised a dispute, you should wait for answer from Envato Support (which can take few days). Meanwhile, make sure to read refund policy to make sure if you are entitled for a refund:

I got the product wrong, I don’t know xamarin, I bought it for android studio