I'm using a debit card and added all the information correctly, but it keeps popping up the same message. I'm doing this on my Xbox 360, not online, but I want the special offer of that 3-month 50% off with 800MS, and as far as I know, I can't do that here. No option to do that.
I've used other accounts before with the same card, but I've taken the card info off the other account and it still shows the same pop up. The bank I use also showed no problems. What am I doing wrong?!