Thanks for writing in! Please advised that the purchased code from ThemeForest and the license code can only be used to validate the X theme. This license will not allow you to validate the bundled plugins mentioned above. You will not have to validate them because we will be one responsible for the plugin updates. To know more how we have integrated these plugins in the theme, please check out this link:
And with regards to refunds;
All sales are handled through ThemeForest, and their parent company Envato handles all refund requests. You can read more about their process here
Hope this helps.