Mistaken Purchase from Buyer

Hello fellow authors,
In last few months envato is probably doing the marketing stuffs high. So new buyers are also coming. I am a videohive author and uploaded After Effects and Pre-rendered Motion Graphics project both. Many of the buyer purchase my Motion Graphics project and complaining that its not an after effects project. Although everything is detailed on the page as well as those projects are in category under Motion Graphics.
Some wants refund and some wants exchange of the project. What step of awareness can be better for me as well as Envato to down these Mistaken Purchase.

As you don’t have the ability to provide an official refund, just refer them to support.