Call up the billing department (my former work) at 480-505-8855
I imagine you should get this charge removed without too much problem. If they give you any trouble, just throw a little stink, ask to speak to a supervisor, and they will almost always remove the charge.
I had a .de name autorenew about 30 days before expiration. Didn't plan on renewing this as I was gonna drop. Emailed Godaddy & they said cancel the name & they'll refund, so I did. Received an email that it's been done. But it was only an account credit, not a refund to the c/c
So, you shouldn't have issues getting an account credit if you don't want the name.