Do you have a link for the moderator? Ticketmaster (not surprisingly) has been absolutely no help at all.
It has nothing to do with Ticketmaster as it was a Live Nation accident. Live Nation are the ones issuing the refund. Have you already emailed as the instructions asked with your parking stub number? If so PM me all that info and I will forward to Live Nation to follow up. You can find those instructions in the old news posts if you haven't done that step yet.