When Ticketmaster mailed out misprinted tickets for the '03 Wembley Arena show, I was able to get a TM manager on the phone who expedited my new tickets for me.
Since I was traveling from the U.S., I did not have time to return the bad tickets and wait for new ones like they wanted.
If you have a travel situation that won't allow you to wait for your tickets, maybe this is something you can do. Sorry, I did not keep TM's phone number, but I seem to remember their office being located in Manchester. Hope this helps.