depending on which screen you see a three finger swipe on the ‘card is on its way’ screen might help to get you past your current screen to enter some details - swipe up according to the linked message ? - cant remember which way 
if that doesnt work try emailing help@monzo.com or tweet @monzo (the one on twitter not the Dec 16 member that has the @monzo registered name ( awkward but must get a lot of messages )
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