You’d submit a ticket. We have an automated refund system that will scan your account for recent purchases, since this isn’t a purchase you made it likely won’t give you the option there. Just select “I still need help” and describe your issue.
The loss really isn’t a factor, it’s primarily about how our refund policies and procedures work. If it qualifies for a refund we’ll be able to do so, otherwise, the license won’t be able to be moved off of the account. Have you tried talking to the people sending you these gifts? Maybe if they were aware that you don’t want them, they’d stop sending them? Not sure if that is an option for you.