Well if MoL sees this that 40DKK will be on your account as fast as lightning. Would you like me to tell him!
I've noticed when going back to an EZY booking (I don't fly O'Keary) to make a change or add an ancillary charge, that the fee is not charged.
I had a strange experience yesterday, I recharged our prepaid Dutch cellphone. It had a balance of a couple of Euros, I added €40, got the receipt etc, and this morning get a text saying the balance is now €113. Don't know yet how much they've taken off my card of course!