Hi,
According to Envato Market Refund Rules, in the section “Item support extension not used”, it clearly states “If you purchase an item support extension and request a refund of that extension before your existing item support expires we would expect the author to provide you with a refund of that item support extension.”
Please check the print screen here: https://prnt.sc/uxju7o
You can find the Envato Market Refund Rules here: https://themeforest.net/page/customer_refund_policy
Also in the licenses FAQ, found here https://themeforest.net/licenses/faq
it clearly states that the license is transferable when I create a site for a client, if I sell my website, if I offer an on demand website creation, if I use it as a prize.. So there are at least 4 different cases that the license is transferable. Check the print screen here https://prnt.sc/uxjwqz.
So, I would to request a refund for the support extension.
And your instructions on how to move my license to another user.