Closed as it’s been sorted.
You can’t. If it’s fraud, then you’ll need to cancel the card.
You could subscribe to Plus, get a virtual card, attach that to a pot, put all the money in there and spend freely.
Or manually do the above moving it back when you need it. Or freeze and unfreeze the card. Then report when you get home.
I would definitely report it right away if you expect it to be reimbursed.
You need to see if there’s any solution Monzo have on the card or find another payment method for the trip.
If I recall it’s the card supplier that charges that. Monzo said in the past they charge no markup on the delivery I am sure.
I don’t think it does, when I reported fraud I got all the “removed from ApplePay” notifications