how do I unlicense something that I purchased accidentally?

Hello @Azura36515857mzji, Sorry but I don't have the ability to give credits for this license type. I recommend reaching out to Adobe customer care who has the best ability to help resolve this for you:

Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled! If the chat window fails to open, or is non-responsive, use a different device to start the interaction. Also, if you don’t see the chat feature you may need to accept all adobe cookies.

Perhaps @Contributor1 can assist with your request.