UP2414Q, Australia, No service tag?

Hi, I have a similar problem because I'm needing to send mine for warranty purposes. I bought mine direct through the AU store however the monitor isn't on my order list and it also doesn't have a service tag as you said. Therefore I can't get any support as the phone lines just hang up on you and you can't get online support without a service tag. Please let me know what I can do because I'm quite annoyed as it has been working for a few months with it set to DP1.2 as a tiled display and now it won't work all of a sudden. It seems that one of the scalers is not working. I'm also annoyed as the product didn't specify that it was tiled (only saying that it required DP 1.2 for 60Hz and that should not imply it is an MST display as SST displays also use DP 1.2. I would like a replacement or help for my product and if no results can come from it I would like a refund for lack of product information especially when the MST function makes it incredibly hard to scale your resolution for different tasks.