Viagogo tickets - paper ticket is thousands of miles away for event tomorrow and they told me it was a local

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I bought a ticket and as it was only a few days before the concert and it's a paper ticket they said the seller was in my city so delivery would be by courier.
I bought it on Thursday for Sunday. Got a message on Friday saying the courier had picked it up and it would be with me in 4 hours.
Didn't show up after 4 and tracking number was empty. I contacted them and they gave a tracking number that showed it was in Melbourne, Australia and I'm in Bangkok! The ticket has now got to Sydney but the concert is tomorrow night. I'm not sure it'll make the 4'000+ miles in the next 16 hours!
Has anyone had this issue? Viagogo say don't worry they have spare tickets if it doesn't arrive but not sure I trust them as they said the ticket was in Bangkok to start with and a courier would deliver it!