Money are being withdrawn for no reason

Hi, today I`ve got a message from my bank that 5.49 USD had been withdrawn from my card (Apple.com/BILL, ITunes.com). I`ve looked through the whole list of my purchases and emails and haven’t seen anything that could be related to this amount of money, furthermore, I recognise every payment from my bank account except this one. How can I return my money if there’s no information about which purchase it could be related to and is impossible to contact support from my location (Ukraine). You`re my last hope!