Why was I charged an extra €25 for AirPods Pro?

Recently purchased AirPods Pro 3 using a €25 gift card and my credit card, at first was only charged -€15 and -€209 (2 separate transactions) but still added up to the €224 balance left after gift card was spent, however 13 minutes later they charged me €25 too. Is this just taken while the gift card is verified or have they decided randomly they want to take an extra €25? Thanks for any help