Please log in to http://store.tms-plugins.com/ and under "My Licenses" click on the Three Dots on the right-hand side of the license you want to submit a refund request for:
If you don't see it, that means that the 15-day money-back guarantee period ended, and as per our Refund Policy, you're no longer eligible for a refund. After you submit a refund request, you will not receive any confirmation emails, but you will see that the button is grayed out:
That means that the refund request is successfully submitted and that you will receive your refund in 5 - 7 business days.