Problem with my PURCHASE of apple cards, NOT any issues with redeeming them?

Becauseof my own incompetence, I attempted to purchase and email an apple gift card to someone. I kept trying to buy and send one, but couldn't (I thought) even though I tried 4x. A bit later, I figured it out and bought and emailed the gift card I wanted. BUT it seems like I actually did purchase those four cards and would like to know if there is any way that I can cancel those cards without having to go to my credit card issuer and try to cancel things there. Is this possible?