WooCommerce Checkout Drag and Drop Files Upload

I just bought about plugin last week, and it can install but is no working. The file is mention to fail to upload. And my package is include support but when i ask to Author he no reply me until today. What can i do now?

Hi @MyFMCG ,

Please give the author time to get back to you. If the author don’t reply you within 3 days you can request a refund here
Here is all the information about refunds:
Envato Market Refund Rules

Thanks