Welcome to our support forums and thanks for reaching out to us!
WooTickets license holders are granted a free Event Tickets Plus license (with same expiration date). This sometimes take a few hours to process, but I’ve just checked your account and I see you indeed have a valid license for both plugins. As this is the case I guess there’s no need for the refund.
Please re-check this in your licenses keys page and let me know,
Best,
Nico