There is a small chance there is a misunderstanding on Rollbit's end, but odds are you have other accounts. They don't just flag accounts for the heck of it and they're definitely not going to try to rob you for a little over $1000 lol. Like I said, there's a small chance there is a misunderstanding, but IMO there is not and you have other accounts. In any case @holydarkness might be able to help you.