I'm not able to buy a realm for me and my sister to play on and I've tried both her card and my card to purchase it and every time I type it out the details it tells me there's an error or says that I need to verify payment info and try again but I've typed it out so many times and I know the details aren't wrong
This appears to be a payment related issue and the bug tracker does not have access to the appropriate resources to help you with this problem. Instead, please contact Mojang Support in order to receive assistance.