Hi Carol,
The card’s are sent 1st class so hopefully, yours will arrive tomorrow.
Since your card is already on it’s way, the only way to pick it up sooner would be to collect it from Monzo’s office.
If that won’t work for you, I’d recommend messaging the support team by emailing help@monzo.com.
I’ve removed the @monzo mention from your post, as it would have sent a notification to every member of the team in this community, many of whom aren’t part of the support team.
I’ve also moved your post here, in case the earlier advice that’s been posted here is of any use & to keep all of the information about this type of situation in one place, to make them easy for other users to find. I hope that helps 