I’m frustrated

Constant tech error while booking

Hi, I've been trying to book return train tickets online (Barce-Madrid) from Singapore since last night - have tried at least 5 times now and keep getting a technical error. One of two things keep happening:
1/ I make it all the way to the payment and MC payment verification stage, then get the attached screenshot.
2/ I try refreshing the page / opening a new tab and the price options are all gone.

Is there any way to resolve this quickly?

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