Extremely careful when you use Revolut. They let merchant charged me even I did not authorise. I used Revolut card for the first payment when I bought a prepaid SIM card but the mobile operator auto charged me another month without my knowledge and permission. Please remember it's a PREPAID SIM card, not postpaid but Revolut still let them do it even I DID BLOCK my card. It's extremely disappointed to pay monthly premium service to Revolut and being treated this way.