Happened to me too. The whole thing makes no sense to me. Why does this only seem to happen with FIFA items? Someone going to the trouble to hack xbox accounts only wants FIFA items? Something seems very screwy to me about this, and I strongly suspect this is happening on the LIVE or EA end somehow rather than through our accounts.
On top of that, MS handling of the issue is very poor. I've spent an hour on the phone with MS, and I'm totally fed up. Microsoft will NEVER get another credit card number of mine. NEVER. Not for anything.
Try to get them to take your credit card off the account.. You can have a wonderful time with that. The response is really criminal. I was told that my card could not be removed without cancelling my XBOX Gold Family plan, which I just paid for, and so I would essentially forfeit something I had already paid for. Is there any legitimate reason for this? No. The subscription is paid for. There is absolutely no basis for this. I repeat, the subscription is paid for, but if I don't leave my credit card associated with an account that has been hacked, I have to give up my subscription. Absolutely idiotic.
On top of that, of course, just to get my points back they have to freeze my account for 25 days to investigate? Also, makes no sense. Glad I just bought BF3.
Like I said, I'm done with them. In this day and age, this type of hack will happen, but the response is not acceptable. They just seem to come up with things to make a paying customers life difficult.
Like I said, never will they get another credit card number from me, and if I can help it, not another dime either. I'll be looking at other options for the next generation console, or just do without. It's not worth it.