Monzo keep taking duplicate payments

[Revels]

This post explains it better than I will…

Charged twice for clothing

Nike are processing the transactions incorrectly and creating a mismatched presentment. They’re authorising the full amount of the order, then when they ship individual items they’re issuing a second charge (but using a different auth code) without reversing the initial auth. If you get in touch with chat then we can reverse the initial charge in most cases. You’ll just need to make sure you keep the balance in your account as they’ll continue to charge you as more items ship.

Are they in-person transactions or online?