Just waiting for the punters who have been hit by this to be past back on forth between the bank and Ticketmaster each saying that you need to get your money back from the other party as they are not to blame
If paying by UK credit card, it's possible that Section 75 would apply. I'm not entirely sure though as there is a third party involved though.
S75 is a great thing - that and not having to pay until the statement is due makes a CC kinda like a financial firewall. I'd never pay with anything else.